stoner 63 lmg manual

7/28/2019 Stoner 63 LMG Manual

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. ']'.J " .

THIS PUBLICATION DOES NOT CONTAIN CLASSIFIED INFORMATION

PRELIMINARY OPERATOR'SAND ORGANIZATIONAL

MAINTENANCE MANUAL

5.56MM LIGHT MACHINEGUN,BELT FED: STONER 63A

MANUFACTURED BYCADILLAC GAGE COMPANY

Small Arms DivisionWarren, Michigan

~ ~ ~ { > ; ' DE KRUITHOORN N.V.'s.HER OG.!"W 'JSCH - HOLLAND

THIS PUBLICATION IS NOT AVAILABLE THROUGHADJUTANT GENERAL PUBLICATIONS CHANNELS.


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Table of ContentsParagraphs Page

CHAPTER 1. INTRODUCTIONSection I. General ...............................

II . Description and data. . . . . . . . . . 2 2

CHAPTER 2. OPERATING INSTRUCTIONSSection I. Service upon receipt of materiel. . . . 5 5

II . Controls . . . . . . . . . . . . . . . . . . 7 6III. Operation under usual conditions.. . . . 10 9

CHAPTER 3. ORGANIZATIONAL MAINTENANCE INSTRUCTIONSSection I . Repair parts, tools, and equipment . . 22 13

II . Lubrication . ............................. 25 14III. Preventive-maintenance services . . . . . . 28 16IV. Troubleshooting . . . . . . . . . 30 18

CHAPTER 4 . MAINTENANCE OF MACHINEGUN .......... 32 21APPENDIX I. REFERENCES. . . . . . . . . . . . . . . . . 35

APPENDIX II . BASIC ISSUE ITEMS LIST . . . . . . . . . . . . . . . . . 36

APPENDIX III. ORGANIZATIONAL MAINTENANCEREPAIR PARTS, AND SPECIALTOOL L IS T . . . . . . . .. . . . . . . .. . . . . . . .. . . . 40


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CHAPTER 1INTRODUCTION

Section I . GENERAL

1. SCOPEa. This manual contains instructions for operator and organizational

maintenance of the Stoner light machinegun, belt-fed ..Q.. Appendix I contains a list of current references and publications

applicable to this materiel.Q. Appendix II contains a list of basic issue items, repair parts, and

tools and equipment which are required for operational maintenance ofthe weapon... Appendix III contains a list of repair parts, special tools and

equipment which ar e required for performing organizational maintenanceof the weapon.


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2

Section II . DESCRIPTION AND DATA

2. DESCRIPTION.lc The Stoner light machinegun (belt-fed) is a 5 .56mm automaticweapon (figure 1) The ammunition is fed into th e weapon by means of

a disintegrating metallic link belt. The weapon fires from th e open-boltposition and features a quick-change barrel. The operational energy isprovided by the gas from th e fired round.

b. Sights are adjustable in l / mil increments in windage andelevation and are graduated on a scale from 200 to 1100 meters. Thefully-adjustable front sight can be zeroed to th e rear sight in bothwindage and elevation.

3. NAME AND SERIAL NUMBERThe name and serial number of th e weapon are stamped on the bottom

of the receiver in front of th e trigger housing (figure 14) .

FIGURE 1. STONER LIGHT MACHINEGUN. BELT-FED LEFT AND RIGHT VIEW


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4 . TABULATED DATAa. Weight (in pounds) .

Light Machinegun, belt-fedFull plastic ammunition box (100 rounds)SlingFiring Weight (100 rounds, sling and bipod)Bayonet knife, M7Scabbard, MBA!BipodBipod case

b. Lengths (in inches) .Light Machinegun, belt-fedLight Machinegun, belt-fed, with bayonetBarrel (bolt face to muzzle)Barrel with Extension & Flash Suppressor

c . Mechanical FeaturesRifling

Bore diameter (maximum)Groove diameter (maximum)Sight Radius

Trigger PullMaximumMinimumMethod of OperationType of Lock MechanismMethod of Feeding

Cooling

d. AmmunitionCaliberType

11.68 lbs.3. 31 lbs.0. 31 lbs.

16.18 1bs.0. 60 lbs.0 .30 lbs .0. 88 lbs.0. 31 1bs.

40.25 in.45.6Sin .20.00 in.21.67 in.

Right Hand Twist(6 grooves),one turn in 12 in..220 in ..2245 in.22.25 in. (fromrear of rear sightaperture to midpoint of front sight)9 1bs.6 lbs.GasRotating boltBelt feed, disintegrating metalliclinkAir

5 .56mm (. 223 calibBall, tracer andblank.


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e . Firing Characteristics Muzzle VelocityMuzzle EnergyChamber PressureCyclic Rate of FireMaximum Sustained Rate of FireMaximum Effective Rate of FireMaximum RangeMaximum Effective Range

3250 fp s _ 40 fps1300 ft . lbs. (approx)50,000 . 2000 ps iVariable from 700to 100 0 rds. per min.75 - 125 rds. per min.150-200 rds. pe r min.2895 yds. (2653 meters)1203 yd s (llOO meters)


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CHAPTER 2OPERATING INSTRUCTIONS

Section I. SERVICE UPON RECEIPT OF MATERIEL5. GENERAL

.!:! When a weapon is received, i t is th e responsibility of the officerin charge to determine whether the materiel has been properly prepared forservice by th e supplying organization and to be sure it is in condition toperform its function .

.. All repair parts, tools, and equipment will be checked with th eli s t!ng in Appendix II and III .

. . A record will be made of all missing parts, tools, and equipmentand of any malfunctions. Deficiencies will be corrected as quickly aspossible.6. SERVICES

When preparing weapons that are packed with volatile-corrosioninhibitor


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Section II. CONTROLS

7. GENERAL

This section describes, locates, an d illustrates the various controlsprovided for the operation and organizational maintenance of th e weapon.

8. WEAPON CONTROLS Barrel Latch. The barrel latch (figure 2) is located on the top of

the weapon to th e front of th e feed cover. I t consists of three parts,latch, lockpin and spring assembly. Attached to th e rear of the latch isthe locking pin which locks and holds the barrel into position.

]:)_. Cocking Handle. The cocking handle (figure 2) is located onthe right side of th e receiver. This control allows for manual cockingof the weapon when required. The cocking handle spring (figure 19) locksth e handle in its forward position .

.9. Safety. The safety is located just forward of the trigger (figure 2) When pushed all the way forward through th e slot in th e trigger guard,the safety is in the "OFF" or "FIRE'' position. When pulled all the wayto the rear, towards th e trigger, it is in th e "SAFE" position. Thissafety can be moved of f safe without removing the trigger finger fromthe trigger guard by pushing forward with the trigger finger.

. Selector Lever. The selector lever (figure ll ) is located on theleft side of the trigger housing group above and to the rear of the trigger.It is movable to two positions," Auto" and" Semi". The weapon will fireautomatically with th e lever in either position.

FEED COVER

6

FIGURE 2. BARREL LATCH, FEED COVERLATCH. TRIGGER. AND COCKING HANDLE

FIGURE 3. REAR SIGHT--RAISED POSITION


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.. Trigger. The trigger (figure 2) is located below the receiverdirectly under th e rear sight. Its function is to control th e firing of theweapon with the selector lever in the"Auto"or''Semi''position.

f.. Feed Cover Latch. The feed cover latch (figure 2) is locatedon the upper right rear end of tpe feed cover. The function of th elatch is to secure the cover in th e closed position. Pushing the latchforward unlatches the feed cover from th e receiver.

_g:. Rear Sight. The rear sight (figure 3) has two controls and a battlesight.

(1) Elevation knob. The elevation knob (figure 3) is located onth e right side of the leaf sight. The function of th e knob is to providefine vertical adjustment of the sight.

(2) Windage knob. The windage knob (figure 3) is located onthe left side of the sight base. The function of th e knob is to provideaccurate lateral adjustment.

(3) Battle sight. The battle sight (figure 3) is located on thebase of the leaf sight and is used when th e leaf sight is in the down positionand corresponds to the leaf sight set at a range of 200 meters.h Front Sight. The elevation adjustment for zeroing th e weapon is in

th e front sight base (figure 4) , an d adjustments are made by using thetip of a cartridge. To raise or lower th e front sight post, depress thedetent at the base of the front sight post and turn the post in th e desireddirection. To move the point of impact up, turn the sight post in th edirection of th e arrow and the word "UP" stamped on th e base.

J.. Adjustable gas yalve. The adjustable gas valve is located in th efront sight base (figure 5 and 6) . The valve can be set to any one ofthree positions. By inserting the point of a cartridge into the hole overth e valve lock detent (figure 5), and pushing down on th e detent, youunlock the valve which then may be moved one way or th e other dependenton which size gas port setting is desired. The slowest rate of fire isobtained when the narrowest indicator notch is set over th e valve lockdetent and the detent allowed to lock the valve in place. The threeindicator notches are sized according to th e size of the gas port alignedwith the gas port in the barrel. The widest notch is used when the fastestrate of fire is desired. This valve may be removed for cleaning purposesby rotating th e valve (figure 6) until th e flat exposes the roll pin. Thenpush th e valve out from the left side.9. BIPOD

a. Spring Control. The clamping action of th e biped (figure 7) iscontrolled by two springs, one spring mounted inside of the other. Thesprings are located directly beneath th e biped hinge.


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.Q.. Leg Extension Control. Bipod le g extension is controlled by springlatches mounted in th e le g extensions. Leg adjustment is accomplishedby depressing the latch (figure 7) located on the inner side of each le gand extending the legs to desired height.

s;:. Bipod Lock. A spring loaded bipod lock (figure 7) is providedto lock tho bipod to the weapon or when collapsed to carry in its case .

FIGURE 4 . FRONT SIGHT

PU\T FORREMOVAL PURPOS

BAYONET

FIGURE 5. ADJUSTABLE GAS PORT (RIGHT SIDE VIEW

FIGURE 6. ADJUSTABLE GAS VALVE (LEFT SIDE VIEW) FIGURE 7. BIPOD CONTROLS

8


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Section III. OPERATION UNDER USUAL CONDITIONS

10 . GF:NERALThis section contains instructions for th e operation of the weapon

under conditions of moderate temperatures ond humidity. Instructionsfor operation under these conditions are covered in paragraphs 25 through27.11. PREPARATION FOR FIRING

a. The light machinegun, belt-fed, may be fired from the prone,sitting, hip, or standing position. When


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10

.. Loading th e Weapon. The rounds should be securely assembledand positioned in their push-through type links. Set the safety on "Safe",pull th e cocking handle to th e rear, return th e cocking handle to its lockedposition. Unlatch and raise th e feed cover (figure 9) . The feed trayshould remain down on th e receiver. Remove th e cover from the plasticammunition box and insert it in the other side of the box leaving it partlyopen. Attach the box to th e tray, place the linked belt on th e feed tray(figure 9) with th e first round to be fired in the feed groove. The feedtray belt-holding pawl will then engage the second round. The ammunitionbelt must be positioned with th e open side of the links facing down topermit stripping of th e cartridge from th e link. Close the ammunition boxcover completely. Close the feed cover, making sure that it is latchedsecurely.14. ZEROING

The weapon will be zeroed in accordance with instructions containedin FM 23-67.15. FIRING WEAPON

WARNING: MAKE SURE THE SAFETY IS IN THE "SAFE" POSITION WHENTHE WEAPON IS NOT BEING FIRED. With th e weapon loaded and aimed,set the safety lever forward to its "Off" position, and pull the trigger. Theweapon will continue to fire until th e belt is exhaustad or th e trigger isreleased. When th e belt is exhausted, th e last two links of the beltwill remain in the feed tray, and must be removed by hand when th e coveris opened to reload.NOTE: THE WEAPON FIRES AUTOMATICALLY WHEN THE SELECTOR LEVERIS IN EITHER THE "SEMI" OR "AUTO" POSITION,16. MISFIRE, HANGFIRE, AND COOKOFF

Misfire. A misfire is a complete failure to fire. A misfire initself is no t dangerous but, since it cannot be immediately distinguishedfrom a delay in the functioning of the firing mechanism or from a hangfire(!2. below), it should be considered as a possible delayed firing untilsuch possibility has been eliminated. Such delay in the functioning ofthe firing mechanism, for example, could result from the presence offoreign matter such a grit, sand, frost, ice, or improper or excessiveoil or grease which might create initially a partial mechanical restraintwhich, after some indeterminate delay, is overcome and the firing pinis then driven into the primer in the normal manner. In this connection,no round should be left in a hot weapon any longer than the circumstancesrequire because of the possibility of a cookoff (below). Refer toparagraph 17 for removal procedures.


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_]2. Hang fire. A hang fire is a delay in th e functioning of a propellingcharge at the time of firing. The amount of delay is unpredictable but,in most cases, will fall within the range of a split second to severalseconds. Thus, a hangfire cannot be distinguished immediately froma misfire and therein lies the principal danger of assuming a failure ofthe weapon to fire immediately upon actuation of th e firing mechanism isa misfire, whereas, in fact, it may prove to be a hangfire.WARNING: DURING THE PRESCRIBED TIME INTERVALS. THE WEAPON WILLBE KEPT TRAINED ON THE TARGET. ALL PERSONNEL WILL STAND CLEAR.OF THE MUZZLE. REFER TO PARAGRAPH 17 FOR REMOVAL PROCEDURES.

Q. Cookoff. A cookoff is a functioning of any or all of the explosivecomponents of a round chambered in a very hot weapon du e to the heatof the weapon. I f the primer or propelling charge should cookoff, th eprojectile may be propelled from the weapon with normal velocity eventhough no attempt was made to fire th e primer by actuating the firingmechanism. In such a case, although there may be uncertainty as towhether or when the round will fire, th e precautions to be observed arethe same as those prescribed for a hangfire (. above) . To prevent acookoff, a round of ammunition which has been loaded into a very hotweapon should be fired or removed after the round is in th e weapon 5seconds. Refer to th e following paragraph for removal procedures.17. PROCEDURES FOR REMOVING A ROUND IN CASE OF FAILURE TO FIRE

_g_. General. After a failure to fire, due to the possibility of ahangfire or cookoff, th e following general precautions, as applicable,will be observed until th e round has been removed from th e weaponand the cause of failure determined.

(1) Keep th e weapon trained on the target. All personnel willstand clear of the muzzle.

(2) Before retracting the bolt, either to remove th e round orrecook the weapon, personnel no t required for th e operation will becleared from th e immediate vicinity.

(3) The round, after removal from th e weapon, will be keptseparate from other roun


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.Q.. Time Interval. The definite time intervals for waiting after failureof weapon to fire are prescribed as follows: Always keep the round lockedin th e chamber for 5 seconds from the time a misfire occurs, to insureagainst an explosion outside of th e gun in th e event a hangfire develops.I f the barrel is hot and a misfire stops automatic operation of th e gun, wait5 seconds with th e round locked in th e chamber to insure against hangfiredangers, then extract immediately to prevent a cookoff. I f th e roundcannot be extracted within 5 seconds, it must remain locked in the chamberfor at least 5 minutes due to the possibility of a cookoff.

WARNING: DO NOT RETRACT THE BOLT WHEN A HANGFIRE OR COOKOFFIS SUSPECTED. A HANGFIRE WILL NORMALLY OCCUR WITHIN 5 SECONDSFROM THE TIME THE PRIMER IS STRUCK AND A COOKOFF AFTER lO SECONDSOF CONTACT WITH THE CHAMBER IN A HOT BARREL. ONE HUNDRED-FIFTYROUNDS FIRED IN A 2-MINUTE PERIOD WILL MAKE A BARREL HOT ENOUGHTO PRODUCE A COOKOFF,18 . DOUBLE FEED

A double feed is a malfunction which occurs when th e empty casefails to eject and another round is picked up by the bolt. Neither canfeed or chamber properly and both become jammed and deformed. Bothrounds can be ejected manually using th e cocking handle. The causenormally is a short recoil which indicates a dirty gas port or faultyammunition.19. SERVICE DURING FIRING

No during-firing service operations are required for this weapon.20 . UNLOADING THE WEAPON

.2 To unload a cocked, loaded machinegun, move the safetyto the" $afe"position. Raise the feed cover, remove the belt and remaining link in th e feed tray. Check the receiver and chamber to make sureno rounds remain.21. SERVICE AFTER FIRING

Perform the after-firing operations. Refer to Table 2.


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..

CHAPTER 3

ORGANIZATIONAL MAINTENANCE INSTRUCTIONS

Section!. REPAIR PARTS, TOOLS AND EQUIPMENT22 . GENERAL

Repair parts, tools, and equipment are issued to the using organizationfor operating and maintaining th e materiel. Tools and equipment should no tbe used for purposes other than prescribed and, when not in use, should beproperly stowed.23. REPAIR PARTS

Repair parts are supplied to the using organization for replacement ofthose parts most likely to become worn, broken, or otherwise unserviceable,when replacement of these parts is authorized to the using organization.Repair parts supplied to the using organization are listed in Appendix II,which is the authority for requisitioning replacements. Repair parts suppliedfor organizational maintenance are listed in Appendix III.24 . SPECIAL TOOLS AND EQUIPMENT

Special tools are listed in Appendix III.


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Section II, LUBRICATION25 . LUBRICATION INSTRUCTIONS

The lubrication instructions (Table 1) prescribes cleaning andlubrication procedures as to locations, intervals an d proper materials.

Table 1. LUBRICATION INSTRUCTIONS

Item Procedure

LIGHT Immediately after firing, the barrel boreMACHINE GUN an d other surfaces exposed to powder(BELT-FED) residue or gases will be thoroughlycleaned with brushes saturated with CR.Other surfaces will be cleaned with SD.After cleaning, all surfaces an d compon-ents will be thoroughly dried with cleancloths or swabs (patches) Clean, after firing an d weekly thereafterwith SD or TPM; wipe dry and oil with PLspecial (or LAW for below 0F. weatherconditions) .

BIPOD Clean and oil all moving parts.

MATERIALS TO BE USEDCR- CLEANING COMPOUND, SOL-

VENT Rifle bore cleaner.SD- DRY-CLEANING SOLVENT or

TPM---THINNER, PAINT,MINERAL SPIRITS.

PL special LUBRICATING OIL, GENERALPURPOSE, above 0F.LAW- LUBRICATING OIL, WEAPONS,

below 0F.


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26. GENERAL LUBRICATION INSTRUCTIONSa. Usual Conditions. Lubrication intervals specified in Table 1, arefor n;:;rmal operation and where moderate temperature and humidity prevail.]2. Reports and Records. Report unsatisfactory performance of

materiel or effect of prescribed lubricants and preserving materials.27. SPECIFIC LUBRICATION INSTRUCTIONS

_s. General. Lubrication will be performed more frequently thanspecified in table 1 to compensate for abnormal operation and extremeconditons, such as high or low temperatures, prolonged periods ofhigh-rate operation, or continued exposure to moisture, any one ofwhich may quickly destroy th e protective qualities of the lubricant.

1:!. Chanoing Grade of Lubricants . Lubricants are prescribed inaccordance with temperature ranges: above 0F. , and below 0F.The time to change the grade of lubricants is determined by maintaininga close check of the operation of the weapon during th e approach tochangeover periods in accordance with weather forecast data. Ordinarily,it will be necessary to change grade of lubricants only when air temperature is consistently above or below 0F.

g. Extreme Cold Weather; Apply a light coat of weapons lubricating oil(LAW) to all operating mechanism surfaces. Materiel should be exercisedmore frequently during periods of low temperature to insure proper functionin

s;!. Extreme Hot Weather. Special lubricants will ordinarily no t berequired at extremely high temperatures, as lubricants prescribed fortemperatures above 0F. provide adequate protection. However' morefrequent servicing than specified in Tables 2 and 3 is necessary becausethe heat tends to dissipate th e lubricants.

g . Humid and Salt-Air Conditions. High humidity, moisture, or saltai r contaminate lubricants, necessitating more frequent service thanspecified in Tables 2 and 3.

j. Before Immersion. Lubricate materiel before amphibious operationas prescribed in Table 1.

Sl After Immersion. After immersion, perform th e maintenance desscribed in paragraph 28 and 34

.!J.. Sandy or Dusty Conditions. I f firing or prolonged travel has occurreunder dusty or sandy conditions, clean and inspect all lubricated surfacesfor fouled lubricants. Lubricate as necessary.


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Section III. PREVENTIVE - MAINTENANCE SERVICES

28 . SPECIFIC PREVENTIVE - MAINTENANCE PROCEDURES FOR THE OPERATOR'Table 2 gives th e specific procedures to be performed on th e weapon

by the operator for each daily service.Table 2. OPERATOR'S PREVENTIVE MAINTENANCE CHECKS AND SERVICES

Interval & Sequence No OPERATOR - DAILY SCHEDULE

" "" .,., .... "" Item to be" "'... " -- (I) " '. - .... ... : : - Ins,pected Procedures ParagTaph< "'" References1 Bore Clean all surfaces of the bore 34 .s (4)

and wipe oil from bore andchamber;

2 Bolt Retract bolt to assure free move- 3 3 .!.ment between bolt carrier andgas tube.

3 Action Hand function to assure properParts operation.

4 Entire Examine bore for evidence of 34 .!. (5)..weapon powder fouling or corrosion.

Clean bore after firing, thenoil as prescribed.

5 Entire Wipe outside metal surfaces of 3 4 .!. (5)weapon weapon, clean, an d oil spar-ingly.

6 Bipod Check for smoothness of oper- 36ation through entire range ofmovement.

---

16


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29. PREVENTIVE MAINTENANCE BY ORGANIZATIONAL MAINTENANCE PERSONNRefer to Table 3.

SequenceNo.

1

2

3

4

5

6

7

Table 3. WEEKLY PREVENTIVE-MAINTENANCE SERVICESORGANIZATIONAL MAINTENANCE PERSONNEL

Item Procedure

Barrel Assembly Check for unusual wear and damage tobore.

Barrel Assembly Check for evidence of metal fouling 1corrosion, and use of unauthorizedcleaning material and methods.

Inertia Pin Check to determine if the Inertia pinhas free movement inside the gaspiston.

Action Parts Check for smoothness of operation.Visually examine moving parts forunusual wear.

Action Parts Check for corrosion and damage.

Lubrication See that all items have been lubri-cated as prescribed in paragraph 25.Equipment See that tools an d equipment are

serviceable, cleaned, and properlystowed.


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Section IV. TROUBLESHOOTING30. SCOPE

This section contains troubleshooting information and tests for locating and correcting some of the troubles which may develop in the weapon.Troubleshooting is th e systematic study of trouble signs, testing to determine th e defective component, and applying corrective action. Eachmalfunction is followed by probable causes an d suggested procedures tobe followed.31. TROUBLESHOOTING GUIDE

Table 4 is intended to be used only as a guide in troubleshooting.This table does no t cover all possible malfunctions that may occur; onlythe more common malfunctions are listed. The tests and corrective actionsare governed by the scope of the operator or organizational level of maintenance.

Table 4. TROUBLESHOOTING GUIDE

Malfunction Probable causes Corrective actionFailure to feed. l . Dirty or carboned 1. Clean gas cylinder.

cylinder.2. Lubrication inade- 2. Apply lubricant asquate. required.3 . Obstruction by 3. Remove item block-foreign substan- inQ movements,

ces or material clean and lubricatein receiver. as required.

4 . Defective link 4. Insert new ammuni-or ammunition. tion or link .

5. Ammunition belt 5. Install correctly.installed wrong.

6. Unlatched feed 6. Latch.cover.

7. Damaged or 7. Refer to higherweak driving echelon (direct support)spring assembly. for corrective action.

8. Defect!ve feed 8. Refer to higherpawl or spring. echelon (direct support)for corrective action.


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Table 4. TROUBLESHOOTING GUIDE (continued)

Malfunction Probable causes Corrective action

9. Defective cover 9. Refer to higherlatch. echelon (direct support

for corrective action.Failure to cycle. 1. Frc5zen ejector. 1. Dis as semble andclean.

2. Insufficient gas . 2. Clean gas cylinder.Move adjustablegas valve to nextlarger setting.

3. Faulty selector. 3. Refer to higherechelon (direct supportfor corrective action.

Failure to fire. 1. Faulty ammuni- 1. Remove and replacetion. ammunition.2. Dirty chamber. 2. Clear an d clean,3. Broken or damaged 3. Replace.

firing pin.4. Damaged or weak 4. Refer to higher echelon

driving spring (direct support) forassembly, corrective action.

Failure to extract. 1. Short recoil . 1. Move adjustable gasvalve to larger setting2. Broken extractor 2. Refer to higher echelon

or spring. (direct support) forcorrect!ve action .

Failure to chamber. 1. Ruptured cartridge 1. Remove.case.2. Damaged round. 2. Recharge weapon.

Failure to eject . 1. Short recoil . 1. Move adjustable gasvalve to next largersetting.

2. Frozen or damaged 2. Refer to higher echelonejector. (direct support) forcorrective action.


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Table 4. TROUBLESHOOTING GUIDE (continued)

Malfunction

Failure to cock.

Uncontrolled fire.

Probable causes

1. Short recoil.

2 . Obstruction inreceiver.3 . Broken sear.

4. Deformed searnotch.

1. Broken or wornsear .

2. Worn searnotch.

Corrective action

1. Move adjustablevalve to nextlarger setting.

2. Clean as required.3. Refer to higherechelon (direct

support) forcorrective action .

4. Refer to higher echelon(direct support) forcorrective action.




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CHAPTER 4MAINTENANCE OF LIGHT MACHINEGUN, BELT- FED

32. GENERALMaintenance includes all measures taken to keep th e weapon in top

operating condition. This includes normal cleaning, inspect' on fordefective parts, repair, and lubrication. The individual is authorizedto disassemble hi s weapon to th e extent called "field stripping"(figure 10). The amount of disassembly he is allowed to perform withoutsupervision is adequate for normal maintenance. The frequency ofdisassembly and assembly should be kept to a minimum, consistentwith maintenance and instructional requirements.

I ----

- - - - - - ~ - - - = - - - ~ - - - - - - - - ~I z' I I

FIGURE 10. LIGHT tv!ACHINEGUN - FIELD STRIPPED

The weapon ha s been designed so that i t can be taken a;:>art andput together easily. No force is needed i f i t is disassembled, andassembled correctly. As the weapon is disassembled, the parts shouldbe laid out from left to right. This makes assembly easier because theparts are assembled in the reverse order of disassembly. Disassemblymay be accomplished in th e field using only a cartridge.


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33. DISASSEMBLY.s_. Inspection for'Safe"Condition.

(1) Move th e safety to the"Safe"position, (figure 11).(2) Pull the cocking handle on the right side of the receiverto the rear until th e action is locked open.(3) Return the cocking handle to the forward, locked positi:m.(4) Push forward on the cover latch handle (figure 2) an d raise the

cover. (5) Look in the receiver an d chamber to be sure that the weapon iscleared of al l ammunition an d is safe to disassemble.

(6) Move th e safety to the"Off"or forward position, (figure 12).(7) Close the cover and pull the cocking handle to the recr, stil l

holding the cocking handle, pull th e trigger, then euse th e bolt forward,closing the action.

b. Removing the Driving Spring, Carrier, Piston and Bolt Assemblies.(l) With th e bolt closed an d the safety on" Safe'; push th e take

down pin ou t (figure 11) .(2) Holding the weapon with the left hand under the receiver,

muzzle pointing down, pull the take-down pin with th e right hand until thetrigger housing group is free to pivot downward (figure 12) .NOTE: THE TAKE-DOWN PIN SHOULD NOT BE REMOVED FROM THE TRIGGERHOUSING GROUP.

(3) Still holding the open weapon in the left hand, grasp th edriving spring and remove (figure 12).

SAFETY ON "SAFE" TIUGt:r:R HOUSIN

22

FIGURE 11. DISENGAGING THETAh'LDOWN PIN FIGURE 12. REMOVING THE DRIVINGSPHII\G


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(4) Place the right hand over the back of the receiver and rotatethe rr"uzzle up slowly. The carrier, piston an d bolt assembly will slideout of the receiver (figure 13) .

Removal of th e Trigger Housing Group from the Receiver Group.(1) Unscrew th e pivot pin screw from th e pivot pin nut, and remove

(figure 14) (2) Remove the trigger housing group from the receiver group.

. Removal of the Feed Cover, Feed Tray, Barrel, Cocking Handlean d Forestock Assemblies from the Receiver Group.

(1) Uncrew th e pivot pin screw from th e pivot pin nut, and remove(figure 15). Push forward on the cover latch handle. Raise the cover an dremove the feed cover and feed tray assemblies (figure 16).

(2) Unscrew the forestock pivot pi n screw from th e pivot pi nnut (figure 17) and remove the fore stock assembly.

RECEIVER PIVOT PIN SCREW

CARRIER, PISTON AKDBOLT, ASSEMBLY......EMOVING THE CARRIER-PISTON AND BOLT ASSEMBLY PIN NlJTFIGURE 14. REMOVING TIE PIVOT PINSCREW AND PIVOT ?I\i i':UTCOVER ASSE

FEED COVER

FIGURE 15. RI:MOIJ!i'


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BARREL ASSE

FIGU!=tE 17. PIVOT PIN SCREW AND NUT FIGURE 18. REMOVING THE BARREL ASSY.(3) Depress the barrel latch (figure 18) and remove th e barrel

assembly.(4) Pull back on th e cocking handle until th e cocking handle

lug and disassembly notch are aligned with the rear disassembly notch(figure 19) on the receiver. The cocking handle may now be removed afterpulling it away from the cocking handle guide on the receiver (figure 19)by pulling out and down on the handle.

_:s. Removal of the Firing Pin, Cam Pin, and Bolt Assembly from theCarrier Piston Assembly.

(l) Push down on the base of th e firing pin, (figure 20) untilit is flush with th e back of the carrier cap assembly.CAUTION: FAILURE TO DO THIS WILL CAUSE DAMAGE TO THE FIRING PI N .

While holding the firing pin in this position, rotate the carrier capassembly l / turn counterclockwise with th e side of the index fingerpressing against the cap roller, until it is in line with the bottom of th ebolt carrier (figure 21). Holding th e carrier and piston assembly withth e piston rod down and to th e front, the roller on the carrier capassemnly must be on the left side and the tang on the right.

C C I C ~ : I N G HANDLE SPRING CARRIER CAPCOCKING nA:mLE f


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(2) Remove the firing pin from th e bolt carrier (figure 22) .(3) Push the bolt into the carrier, an d remove th e cam pin .

from th e bolt (figure 23) (4) Remove the bolt from the bolt carrier.

NOTE: THE FIRING PIN MUST NOT BE USED AS A TOOL. IT IS USELESSWHEN BENT OR TIP IS BROKEN OFF,f. Removal of th e Stock from th e Trigger Housing Group.

(1) To remove the stock from the trigger housing group, removeth e stock retaining pin (figure 24) .

(2) Rotate the bottom of the stock upward and remove.

FIGURE 21. CARRIER CAP ASSEMBLY IN LINEWITH TOP OF BOLT CARRIER

FIGURE 23 . REMOVING CAM PIN

BOL CARRIER

FIGURE 22. FIRING PIN REMOVED

PIN' ~IGURE 24. REMOVING THE STOCKRETAINING PINNOTE: THE WEAPON HAS NOW BEEN DISASSEMBLED TO THE EXTENTAUTHORIZED THE OPERATOR WITHOUT SUPERVISION, FURTHERDISASSEMBLY SHOULD BE DONE ONLY BY OR UNDER THE SUPERVI-SION OF, ORGANIZATIONAL MAINTENANCE PERSONNEL.


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_g:. Disassembly of the Trigger Housing Group.(l) Hold the trigger housing group in a vertical position.

Insert th e point of a cartridge into th e hole that th e lock plate tang isengaged in (figure 25), and push th e lock plate forward. Put the pointof the cartridge against the rea r of the lock plate and push it as farforward as possible (figure 26). The lock plate must remain forwardduring disassembly of the trigger housing group so that the trigger pinscan be removed.

(2) Push out the trigger housing cover pin (figure 27), andremove the trigger housing cover.

(3) Push out the trigger pins, and remove the trigger (figure 28)by pushing down on the rear of th e sear and push up on the trigger.

LOCK

FIGURE 25. DISENGAGING LOCK PLATEFROM HOUSING

TRIGGERHOUSING G.OVER

26

~ T R I G G E R PINFIGURE 27. REMOVING THE TRIGGER

HOUSING COVER

FIGURE 26. PUSHING THE LOCK PLATEFORWARD


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LOCK PLATE

FIGURE 29. LOCK PLATE REMOVED FIGURE 30. REMOVING THE SAFETY

FIGURE 31. DEPRESS!l,;G EJECTOR DETENT FIGURE 32. EJECTOR ASSY REMOVED(4) Remove th e lock plate by grasping th e extended front edge

and remove (figure 29) .(S) Remove the safety by grasping it and pulling it to the rear

and down through the trigger guard (figure 30) .h Removal of th e Ejector Assembly.

(l) Depress the ejector detent (figure 31) .(2) Slide the lock plate aside.(3) Pull out the ejector assembly (figure 32).

UNDER SUPERVISION OF ORGANIZATIONAL MAINTENANCE PERSONNEL.SEE FIGURE 33. FURTHER DISASSEMBLY IS RESTRICTED TO DIRECTSUPPORT PERSONNEL ONLY.


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28

3 4. CLEANING, INSPECTION AND REPAIR.9.. Cleaning and Ins paction.

(1) Cleaning Materials.@) Bore cleaner is used for cleaning th e bore, chamber, barrel

extension, and gas cylinder. I t also provides temporary protection from rust.(!?) Hot, soapy water or plain ho t water is a substitute for bore

cleaner. (sj Dry-cleaning sG>lvent is used for cleaning weapons whichare coated with grease, oil, or corrosion-preventative compounds.CAUTION: USE WARM SOAPY WATER TO CLEAN THE BUTTSTOCK AND FORE-STOCK, SOME CLEANING SOLVENTS AND GASOLINE TEND TO SOFTENAND DISTORT THE PLASTIC MATERIAL,

(2) Lubricants.@) Special preservative lubricating oil is used for lubricating

th e weapon at normal and low temperatures.(!?) Medium preservative lubricating oil is used instead

of special preservative oil when the weapon is exposed to high temperatures, high humidity, oc salt water.

(sj "Lubriplate" grease should be applied to workingsurfaces in extremely humid weather or whenever there is a likelihoodthat the weapon will be subjected to immersion in either fresh or saltwater. After immersion in either fresh or salt water, the weapon shouldbe cleaned and lubricated as soon as possible.

(3) Egu!oment furnished for cleaning the weapon.W Cleaning rod (figure 34)(!?) Bore cleaner(sj Rifle oil@ BrushesW Cleaning patches.

(Satisfactory caliber 5 56mm patches can be obtainedby cutting 30 caliber patches into quarters.


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3. Ca m PinIl . Firing Pi n

- ~ - _ _ , _ - - --S Carrier an d Piston

Assembly t:c======jillll-4 . Bolt A s s e m b l y ~ 2 . Driving Spring Afsembly

6 . Barrel Assembly

7. Adjustable Gas ,Valve

N


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30

(4) Before firing.@) Before firing the weapon, th e bore and chamber should

be cleaned and dried. A light coat of oil should be placed on all metalparts except those which come in contact with ammunition.

() Lubriplate should be applied to the parts that show frictionwear. This is particularly important when th e weapon is exposed to rain orsalt water. Lubriplate should not be used in extremely cold temperaturesor when the weapon is exposed to extremes of sand and dust.

() In cold climates (temperatures below freezing) the weaponmust be kept free of moisture and excess oil . Moisture and excess oil onthe working parts cause them to operate sluggishly or to fail completely.The weapon must be disassembled and wiped with a clean dry cloth. Drycleaning solvent may be used if necessary to remove oil or grease. Partsthat show signs of wear may be wiped with a patch lightly dampened witha special preservative lul:ricating oil. It is best to keep the weapon asclose as possible to outside temperature at all times due to the collection ofmoisture which occurs when cold metal comes in contact with warm air.I f th e weapon is brought into a warm room, it should be allowed to reachroom temperatures so that condensation will appear before the weapon is cleaned.(g) In hot, dr y climates, th e weapon must be cleaned daily, ormore often, to remove sand and/or dust from th e bore and working parts. Insandy_ areas, the weapon should be kept dry to prevent the collection of sand.The weapon should be kept covered during sand and dust storms.

(5) After firing .@) The weapon must be cleaned after it has been fired because

firing produces deposits of primer fouling, powder ashes, carbon, and metalfouling. The ammunition has a noncorrosive primer which makes cleaningeasier, but no less important. The primer still leaves a deposit that maycollect moisture and promote rust i f it is no t removed. The cleaning described below will remove all deposits except metal fouling which is relatively uncommon and is removed by Ordnance personnel.() The weapon should be disassembled as outlined in paragraph 33-a through f. The following parts of the weapon should be cleanedafter firing in th e following manner:

Bore. Run patches dampened with bore cleaner or ho tsoapy water back and forth through the bore several times. Next, attach theweapon bore brush to the cleaning rod and run i t back and forth through thebore several times. Follow this with more wet patches. Run several drypatches through the bore and inspect each patch as it is removed. The boreis olean when a dr y patch comes out clean with no evidence of fouling.finally, run an oily patch through th e bore to leave a light coat of oilinside the barrel.NOTE: THE PATCH OR BRUSH MUST BE PUSHED ALL THE WAY THROUGHTHE BORE BEFORE IT IS WITHDRAWN.


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1_. Chamber. Using a suitable brush (figure 34) cleanthe chamber. Dry the chamber with a clean dry patch.

l Barrel Extension. Using a suitable brush (figure 34)clean the lugs of the barrel extens ion. After removing the carbon,particles of dirt and/or brass filings, oil the barrel extension lugslightly.

4. Variable Gas Valve. Remove the gas valve, and withan appropriate-wire brush, clean out the slots of all carbon and/orfouling.

l i. Gas Port. Using a suitable reamer (figure 35) cleanthe gas port in the barrel removing any carbon buildup .

... Gas rings on boss of Front Sight Base. Soak bosswith bore cleaning solvent and wire brush to remove all fouling untilthe rings can move freely,z. Gas cylinder. Using a suitable brush (figure 34)clean the gas cylinder. Dry th e cylinder bore with clean dry patches.Use no abrasives in cleaning the cylinder and do no t oil the interiorsurfaces.

... Gas Piston. Saturate patches with bore cleaner andwipe the exterior surface of the piston as clean as possible. The pistondoes no t need to have a shiny surface to function properly. Do not useabrasives to clean the piston.

JJ,. Bolt Face. Clean the face of the bolt with a patchand bore cleaner. Remove the bore cleaner with a dry patch, and oilthe bolt lightly.

lQ_. Bolt Carrier. Remove all carbon and foreign materialsfrom th e bolt carrier with a patch dampened with bore cleaner. Wipeof f the bolt carrier with dry patches and apply a light coat of oil .

.!!. Receiver Assembly and Trigger Housing Assembly.Inspect both assemblies for dirt and brass filings, Clean both assemblieswith a suitable brush (figure 34) and oil all surfaces lightly. Place a dropof oil on each of the pins in th e trigger housing assembly for lubrication.Jl. Ejector. The ejector is spring actuated. It isimportant that it have free movement. Lightly oil ejector assembly beforeinserting it into the receiver recess. Visually inspect and manuallyoperate for proper function. Dirt, brass filings, or lack of lubricationmay hinder proper function .

.!2. Replacement of parts . All replacement parts (Appendix III) areinterchangeable and require no adjustments when being installed inthis weapon.


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32

2

"''( \f'

:d 6 l4, 71 !g cfro ~ : f .8 ' ....... i ; i 11sl . Slotted tip for Cleaning Rod 8. Utility Brush2. Cleaning Rod (3 Sections) . 9. Chamber Brush3. Cleaning Rod Adaptor for Brush 10. Barrel Extension Brush4. Bore Cleaning Brush 11. Oiler5. Combination Tool 12. Spare Barrel6. Receiver Brush 13. Carrying Case7. Gas Cylinder BrushFIGURE 34. CLEANING EQUIPMENT, COMBINATION TOOL,

SPARE BARREL, AND CARRYING CASE.35. ASSEMBLYNOTE: THE WEAPON SHOULD BE ASSEMBLED IN THE REVERSE ORDER OFDISASSEMBLY.

!iL Installation of the Ejector Assembly (figure 32) .

(1) Insert the ejector with the ejector spring and detent intoth e recess of the receiver.(2) Depress the ejector detent and spring below the lock platerecess and insert the lock plate in the slots of the receiver.(3) Slide th e lock plate over the detent until the detent pops

into the hole in the lock plate (figure 31) .


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p. Assembly of the trigger housing group.(1) Place the lock plate in the left side of th e trigger housing

group (figure 26), insuring that the lock plate is positioned on th e tw olock plate guide pins. The lock plate must remain forward during assemblyof th e trigger housing group.

(2) Place th e safety into its proper position inside the triggerguard and slide i t forward.

(3) Depressing the rear of the sear, insert th e trigger from thetop of the trigger housing an d replace the trigger pin (figure 28).

(4) Replace the trigger housing cover (figure 27), and t te remaining trigger pins. (Trigger pins are interchangeable) .

(5) Align the trigger pins, an d push the extended edge of th elock plate to th e rear. The front edge of th e lock plate should be flushwith th e forward edge of th e trigger housing, an d the lock plate tang shouldbe seated in th e lock plate tang hole (figure 25) .

. Assembly of the Stock to the Trigger Housing Group.(1) Replace th e stock by inserting it in the rear of the trigger

housing group .(2) Insert the stock retaining pi n (figure 24) .

.!. Assembly of th e Carrier-Piston Assembly.(l) Replace the bolt in th e bolt carrier with the ejector groove in

the bolt facing toward the cam track in the bolt carrier.(2) Insert the cam pin through th e ca m track an d into th e cam pin

hole in th e bolt. The flat side of th e cam pin guide lug must be in linewith th e lower side of th e bolt carrier (figure 22).

(3) Replace the firing pin in the bolt carrier and pushing in on therear of the firing Pi!1, rotate the carrier cap assembly 1/4 turn clockwiselocking th e firing pin in the forward position.NOTE: FIRING PIN MUST BE PUSHED IN WHILE TURNING CARRIER CAP.

Assembly of the Cocking Handle, Barrel, Feed Tray, Feed Cover,and Forestock Assemblies with th e Receiver Group.

(1) Replace the cocking handle (figure 19) , by aligning th e disassembly notches with the cocking handle guide an d lug.

(2) Replace the barrel assembly by depressing the barrel latchand inserting the barrel into the receiver group (figure 18) insuring that thesight boss is aligned with the gas cylinder. Lock the barrel into place byreleasing the barrel latch.

(3) Replace the feed tray assembly (figure 16).(4) Replace the feed cover assembly an d insert th e feed cover

pivot nut and screw (figure 15) .(S) Replace the forestock assembly an d insert th e forestock pivot

nut and screw (figure 17) .


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34

i_. Replacing the Trigger Group to the Receiver Group.(1) Align th e trigger housing group and receiver holes, and insert

the pivot pin screw and nu t (figure 14) ..s. Replacing the Driving Spring, Carrier, Piston and Bolt Assemblies.

(1) Align the piston rod with th e gas cylinder and insert the boltcarrier in th e matching grooves of th e receiver. The bolt ca m pin mustbe in line with th e top rail of the bolt carrier before inserting th e assemblyinto th e receiver.

(2) Hold th e receiver with the gas cylinder pointing down and allowthe assembly to slide in as far as it can go.

(3) Insert the driving spring (figure 12) assembly into the recess inthe piston rod.

(4) Pull the takedown pin (figure 11) out as far as it will go.(S) Rotate the trigger housing group up (figure 12) and lock it to

th e receiver group by pushing the takedown pin in.

h. Functioning test .(1) A function test will be performed after assembly of the weapon.(2) A function check of th e weapon consists of checking its

operations while the safety is in th e "Safe" and "Firing" positions. Thefollowing sequence will be followed:

a. Clear th e weapon. Place the safety on "Safe" . Pull thecocking handle to the rear. Return the cocking handle to its locked position.Pull the trigger. The operating parts should no t go into battery.

b. Place the safety in its forward "Off" position. Pull thetrigger. The operating parts should go into battery.

FIGURE 35. CLEANING GAS PORT36. MAINTENANCE OF BIPOD

The only maintenance required to be performed on the bipod assemblyis the normal cleaning and inspection of the adjustable legs, the hingespring, and bipod lock.


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APPENDIX IREFERENCES

The following references should be consulted for additional procedures for the maintenance of the materiel covered by this publication.FM-23-67FM-31-70TM 9-207

Machine gun, 7. 62mm, M60.Basic Cold Weather Manual.Operation and Maintenance ofArmy Material in ExtremeCold Weather 0F to -65F.


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36

APPENDIX IIBASIC ISSUE ITEMS LIST

Section I . PREFACE1. GENERAL

This appendix is a list of the basic issue items that are required for stockage by first-echelon maintenance. It includes the first-echelon maintenancetools and repair parts accompanying th e equipment, all of which constitutethe major end item for issue to users.2 . EXPLANATION OF COLUMNS

.2. Source Maintenance and Recoverability Code. This column lists acode that indicates the selection status and source of supply of the repair, thelowest echelon capable of installing or manufacturing tho repair part, and thorecoverability and expendability aspects of th e repair parts. An example of thiscode is ? , 0 , R. The "P" indicates that the item is a mission stockage listrepair part that is procured ans stocked on a national program basis, th e "0"indicates that the repair part is authorized to Organizational Maintenance, andth e "R'' indicates that the repair part is an expendable, recoverable item.When repair parts supply responsibility has been assigned to a technical serviceother than Ordnance, th e basic number of the supplying technical service islisted in th e first position of th e source code, for example, "11" for a SignalCorps item. Refer to paragraph 4 for a explanation of all codes appearing inthis manual.

.!?. Federal Stock Number, This column lists the Federal stock number whichhas been assigned by the Cataloging Division, Armed Forces Supply Support Cente

g_, Description This column lists the Federal item name (shown in capitalletters) and any additional description required for supply operations. The abbreviation "w/e" (with equipment) when used as a portion of the nomenclatureindicates that th e major item or major combination includes all armament, equipment, accessories, and repair parts issued with the item. The technical serviceor manufacturer's part number is also included for reference .

.. Unit of Issue. This column lists th e minimum quantity that will besupplied. All items are considered as each except where the unit of issueis shown as f t . , in . , such as for bulk materials; the requisition should indicate the exact amount that is required, for example 6 ft

.ll. Quantity Authorized This column lists the quantity of the listed itemauthorized for stockage by first echelon.

f, Illustration. This column indicates the figure number of the illustration that depicts the item. When more than one item appears on an illustration,th e item number is also indicated.


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3 AB.BREVIATIONSassy . . .. . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . .. . . . . . . . . assembly (ies)cal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . caliberctg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . cartridgectn . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . cartonequip ................................ . . . . . . . . . . . . . . equipmentwdn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . woodenw/e .............. ........................ with equipment

4. EXPlANATION OF CODES

a. Source

b. Maintenance Levelc . Recoverability

d. Illustration

p

0NR

ExplanationApplied to repair parts which arehigh mortality parts procured bytechnical services, stocked in andsupplied from the technical servicedepot system, and authorized foruse at indicated maintenance eche-lons.Organizational MaintenanceIndicates a repair part or assemblythat is nonexpendable, recover-able and is economically repairable.

R Indicates a repair part or assemblythat is expendable and recoverableand is economically repairable and,when available, is furnished bysupply on an exchange basis .

NI Indicates a standard military is sueitem an d therefore no t illustrated inthis handbook.


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Section II . BASIC ISSUE ITEMS LISTSOURCE, MAINT.

AND ILLUSTRECOVERABILITY 'CODE FEDERAL "' i:I1(a) (b) ~ ( d ) STOCK DESCRIPTION AND LOCATION :::> E-< FIG."' :::>. 0 NO. "' "' NO -l ....>-10 "' z ~ 1'4 .


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Section II. BASIC ISSUE ITEMS LIST (cont.)

SOURCE, MAINT,AND

RECOVERABILITYCODE FEDERAL DESCRIPTION AND LOCATION 1"1 .STOCK ::> :0::/)a) (b) "'(c) NO. C/) o-. 0 ::l ....


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40

l . GENERAL

APPENDIX IIIORGANIZATIONAL MAINTENANCE REPAIR PARTS

AND SPECIAL TOOL LIST

Section I . PREFACE

This appendix lists all items required or authorized for organizationalmaintenance 2. EXPLANATION OF COLUMNS

I!.. Figure and Index Number. This column lists th e figure and indexnumber in this manual which illustrates the item.

:Q.. Description. This column lists the repair part or tool with itsb


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Section II . ORGANIZATIONAL MAINTENANCE REPAIR PARTS AND SPECIAL TOOL LIST

ILLUSTRATION . ~ QTY.DESCRIPTION i:;Z AUTH.FIG. ITEM a:=>NO. NO. 0::g;

REPAIR PARTS FOR LIGHT MACHINEGUN-BELT-FED33 7 Adjustable Gas Valve . . . . . . . . . . . . 133 6 Barrel Assembly . . . . . . . . . . . . . 133 4 Bolt Assembly ...... ; . . . . . . . . . 133 14 Buttstock Assembly . . . . . . . . . . . . . . . 133 16 Buttstock Retaining Pin {Receiver Pin) . . 133 3 Cam Pin ................................... 1 133 5 Ca.rrier and Piston Assembly ............. 133 15 Cocking Handle Assembly .................. 133 2 Driving Spring Assembly . . . . . . . . 133 12 Ejector Lock Plate . . . . . . . . . . . . 133 13 Ejector Assembly . . . . . . . . . . . . . . 133 9 Feed Cover Assembly ................... 133 8 Feed Cover Pivot Pin Nut and Screw . . . . . . 1 133 10 Feed Tray Assembly . . . . . . . . . . . . . 133 1 Firing Pin ...................... 1 133 17 Fore stock Assembly . . . . . . . . 133 18 Forestock Pivot Pin Nut and Screw . 1 133 23 Lock Plate ..................... 133 21 Safety ......................... 133 25 Trigger . . . . . . . . . . . . . . . . . . . . 133 24 Trigger Pins ......................... 1 433 22 Trigger Housing Cover . . . . . . . . . . . . . 133 20 Trigger Housing Assembly . . . . . . . . . . . 133 19 Trigger Housing Pivot Pin Nut and Screw . . . . 1

SPECIAL PURPOSE TOOLS34 s Combination Tool . . . . . . . . . I *

*1 or more pe r Organizat10nal Unit, as required.

stoner 63 lmg manual

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