winchester lightweight military rifle caliber .224 usa 1958

7/28/2019 Winchester Lightweight Military Rifle Caliber .224 USA 1958

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c.224

I

TRADEMARK

TRADEMARK

..

o T SO CH CAL CO PORAllOC S SY DIVISION

NEW HAVEN, CONNECTICUT


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OLIN MATHIESON CHEMICAL CORPORATIONWinchester-Western DivisionNew Haven, Connecticut

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WINCHESTERLIGHTWEIGHT MILITARY RIFLE

CALIBER .224

May 1, 1958 '.


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TABLE OF CONTENTS

INTRODUCTIONIDESIGN PHILOSOPHY

DESCRIPTION OF DESIGN FEATURESTECHNICAL DATA

GUNAMMUNITION

NOMENCLATURE LISTOPERATING INSTRUCTIONSFIELD STRIPPING INSTRUCTIONSTAKEDOWN AND ASSEMBLY INSTRUCTIONSCALIBER .224 WINCHESTER E2 AMMUNITIONCOMPARISON OF MILITARY CARTRIDGESCALIBER .224 WINCHESTER E2 CARTRIDGECALIBER .224 WINCHESTER 53 GR. FoM.C.BULLET E2VELOCITY, ENERGY AND MID-RANGE TRAJECTORYFOR CALIBER .224 WINCHESTER E2 CARTRIDGETRAJECTORY OVER 500 YARDS FOR CALIBER .224WINCHESTER 53 GRAIN F.M.C. BULLET

Page124999

1014182,4394041

42

43

44


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INTRODUCTIONFor some time now there has existed a requirement fora l ightweight infantry weapon capable of select ivesemi-automatic or fully automatic f i re . In the summerof 1957 Conarc expressed an active interest in aweapon of this type in cal iber .22 centerfire capableof f i r ing a 50 to 55 grain bul le t a t a muzzle veloci tyof approximately 3300 f t / sec . The weight of the r i f l ewas not to exceed five pounds.Consequently a development program was ini t ia ted byWinchester-Western Division of Olin Mathieson ChemicalCorporation to produce a r i f l e and cartr idge combinat ion capable of ful f i l l ing this requirement. Thef i r s t Winchester Lightweight Mili tary Rifle wascompleted in October 1957 and successfully demonstrated a t Fort Monroe on October 25, 1957, and a t FortBenning on November 6, 1957.This f i r s t prototype was followed by an experimentalquanti ty of l ight r i f le s incorporating certain improvements in design which have been delivered to Ordnanceand Conarc for evaluat ion purposes.

MAIN FEATURES5 pound to ta l weight (with empty magazine)Select ive, fu l l or semi-automatic f i re20 round magazine53 grain bul le t3300 f t /sec . muzzle velocity1280 f t - lbs . muzzle energy20" barrel lengthFull stock with pis to l grip37.6" overal l length

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DESIGN PHILOSOPHYFrom the very beginning of the development work onthe Winchester Light Rifle i t was considered ofutmost importance tha t re l iab i l i ty must not besacrif iced to obtain low weight. As a consequencea policy decision was taken tha t the new LightweightRifle was to be designed on the basis of well provenear l ie r guns whose f ie ld re l iab i l i ty had been established in extensive te s ts . As a resul t the bestelements were taken from the Winchester .30 CaliberExperimental Light Rifle , the G30R Semi-automaticRifle , the WAR Automatic Rifle and the .50 CaliberSemi-automatic Anti Tank Rifle , to serve as a basisfor development of the Winchester Lightweight Rifle .By basing t he development of the new r i f l e on provenelements, the extensive test ing experience gainedwith the ear l ie r r i f l e s , was ut i l ized for the newLightweight Rifle , yielding a weapon design of goodinherent re l iab i l i ty and shor t development time toproduction s tatus .During the extensive development of the weapon agreat number of s ignif icant changes were incorporated, resul t ing in improved function and fac i l i t a tedproduction. A key feature of the r i f l e is tha t a l lsub-assemblies are functionally self-contained.Since none of the sub-assemblies rely on adjacentcomponents for primary function, dif f icu l t ies dueto tolerance accumulations are eliminated.To assure re l iab i l i ty under f ie ld conditions i twas decided from the s ta r t tha t only s tee l was tobe used for primary act ion parts . Consequently,barre l , receiver and a l l parts subject to dynamicloading are manufactured from s tee l to obtain highst rength and wear resis tance . Aluminum 7075-T6 isused only in components where no dynamic forces or

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impact occur . A typical example of such a par ti s the t r igger guard which has to withstand onlys ta t ic forces . The stock of the Lightweight Rifleis American walnut .Low weight i s thus achieved by sound design usingconventional materials without compromise of gunl i f e .

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DESCRIPTION OF DESIGN FEATURES

(1) MagazineAluminum magazine of 20 round capacity.

(2) Ga s System IShort stroke piston requires no cleaning ordisassembly during l i fe of gun.

(3) BarrelExternally fluted for weight reduction and increased cooling surface without sacr i f ice tor ig id i ty . Separated by an annular a i r spacefrom the stock to improve cooling and avoidstock burning.

(4) Fire ControlFul l automatic f i r ing is controlled by a timingbar, which i s carr ied forward by the s l ide unt i lthe bol t is l ocked, and then released by a camlug on the barre l . Flying rearward it s t r ikesa rocker arm which t r ips the hammer catch thusf i r ing the r i f l e . The type of f i re i s controlledby a change lever on the l e f t side front end ofthe receiver. When this lever is turned forward,action is fu l l automatic; when turned to the rearfor semi-automatic f i re the timing bar is sprungout preventing contact with the s l ide .

(5) SightsThe r i f l e is equipped with a blade type f ronts ight and a two-position f l ip over s ight , mounted

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on the rear of the receiver . The low set t ing ofthe rear s ight is adjusted for 250 yards and thehigh set t ing for 440 yards.With the low s ight set t ing a maximum mismatch'between l ine of s ight and point of bul le t impactof 4 inches is obtained from the muzzle to 300yards with the mismatch increasing to 1? inchesa t 360 yards . With the high set t ing a maximummismatch of 12 inches is obtained from 360 yardsto 500 yards.This two-position f l ip-over rear s ight i s extremely simple and is capable of quick adjustment.A t rajectory curve and the l ine of sights superimposed is shown on page 44.

(6) SafetyThe safety sleeve re t rac ts the hammer from thesear and also closes the opening in the receiverto prevent entry of sand or other foreign matter .Removal of the safety requires a combined rearward and la te ra l motion which prevents the safetyfrom being easi ly knocked out of the safe posi t ion.

(7) Firing PinRetracted mechanically during the f i r s t par t ofthe unlocking of the bol t and held in retractedposi t ion during the ent i re longitudinal movementof the gun mechanism. I t is released only af te rbo lt is closed and locked . This prevents thef i r ing pin from contacting the primer duringfeeding or eject ing, and therefore the r i f l e canonly be f i red when the bol t is ful ly locked.

(8) ExtractorA mechanical feature of the extractor is tha t i tis mechanically closed into the extractor cut in

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the she l l by the cam cut in the receiver whenthe bolt rota tes and is locked in this posi t ionwhen the she l l is f ired.(9) Bolt

The bolt incorporates the following designfeatures: The lugs are exceptionally ~ a r g ere la t ive to the size of the bol t . Lockingsurface rota tes into a helix locking cam. Thecam's surface that operate on the closing andopening cams on the operating sl ide equal along hel ix . This long sloping cam allows theoperating sl ide to exer t greater force on locking and unlocking of the bol t . The surfacethat the s l ide contacts when carrying the bol tforward also has a hel ix cam. I t is impossibleto f ire the gun when the bol t is open.

(10) StockOne-piec e American Walnut with pis to l grip. Inassembling the action into the stock there isan interference horizontal ly between the takedown pin and the guard shoulders, which have anarr ow projection to prevent the stock fromspreading due to climatic variat ions. Thedimension from the upper to the lower takedownplates is greater than the spread between thebottom of the receiver and the tang on theguard. These features maintain the action underconstant spring tension both horizontal ly andver t ica l ly , when assembled. The bar re l issupported by the front band. When the gun isassembled there is a space between the barreland the wood, the act ion being supported by theupper takedown plate and the front band. This

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design feature prevents the stock from burningunder intensive f i r ing . The holes in the sideof the hand guard are to allow the escape oftrapped heat ., (11) Bolt Hold Open Device

The principle features of the bol t hold, opendevice are tha t the bol t stop automaticallylocks the bolt open when the l a s t shot is f iredfrom the magazine. The bol t wil l remain openaf te r the empty Tllagazine is removed and a loadedone inserted. Following inser t ion of the loadedmagazine the bol t stop is released by pullingthe sl ide handle rearward.

(12) Field StrippingThis gun can be f ie ld str ipped in a few second. without tools . Details of f ie ld str ipping aregiven on Page 18.

(13) Takedown and AssemblyThe complete takedown and assembly is simple andcan be accomplished with a few standard tools .An armorer's k i t is available to fac i l i t a tetakedown. (See page 24).

(14) Un i t DesignGuard, bolt ,and receiver units are self-containedand do not rely on adjacent parts for the i r primaryoperation. This permits interchangeabili ty ofuni ts and fac i l i ta tes function checks.

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(15) Mate r ia lThe material of a l l primary action parts is highgrade alloy s tee l . Functional parts have a casehardened surface to assure and maintain re l iab i l i -ty . The guard and magazine are made of 75ST6aluminum; hardcoated; the butt pla te and frontbar r e l suppor t band are o f 24ST aluminum.

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TECHNICAL DATA

GENERAL

Number of r i f le componentsMagazine capacityProject i le weightMuzzle veloci tyMuzzle energy

WEIGHTS

Rifle less magazineStockActionMagazine, empty

DIMENSIONS

Overall lengthBarrel lengthStock lengthLength of t r igger pul lSight radiusDistance between swivelsDrop of stock from l ine ofa ta t

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s ightheelcomb

71 120 rounds53 grains3300 f t /sec .1280 f t - lbs .

4.91.43.5.14

37.6203113.223.228.5

2.552.20

lbs.lbs.lbs.lbs.

in .in .in .in .in .in .in .in .


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NOMENCLATURE LISTWINCHESTER LIGHT RIFLE - CALIBER .224

PART NUMBER123456789

101112

1314151617

PART NAMEBarrel

I

BoltBolt StopBolt Stop PinBolt Stop Pin SpringButt PlateButt Plate Screw - ToeButt Plate Screw - HeelButt Plate TrapButt Plate Trap Door PinButt Plate Trap Door SpringButt Plate Trap Door 'SpringScrewChange LeverChange Lever PlungerChange Lever Plunger SpringEj ectorEjector Spring

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PART NUMBER PART NAME

18 Extractor19 Extractor Plunger20 Extractor Plunger Spring/21 Firing Pin22 Firing Pin Spring23 Front Barrel Support & Band24 Front Band Retainer25 Front Sight26 Front Sight Key27 Front Sight Pin28 Guard29 Hammer30 Hammer Pin31 Hammer Spring32 Hanuner Spring Guide Rod33 Hammer Spring Abutment34 Hammer Catch35 Hammer Catch Spring36 Hand Guard

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PART 1\ruMBER PART NAME

37 Magazine Case38 Magazine Bottom39 Magazine Follower

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40 Magazine Spring41 Magazine Spring Retainer42 Magazine Catch43 Magazine Catch Pin44 . Magazine Catch Spring45 Operating Slide.J... _

47 O?erating Slide Spring ~ u i d e ~ o d48 Piston49 Piston Bushing Nut50 Piston Bushing Nut Lock51 Rear Sight Base52 Rear Sight Leaf53 Rear Sight Leaf Pin54 Rear Sight Leaf Spring55 Receiver

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PART NUMBER

565758596061

62636465666768

6970

71

PART NAME

RockerSafety SleeveSafety Sleeve CatchSafety Sleeve Catch PinSafety Sleeve Catch PlungerSafety Sleeve Catch Plunger

SpringStockTakedown Plate (lower)Takedown Plate (upper)Takedown Stud ScrewTiming BarTiming Bar SpringTiming Bar Spring Plunger(2)TriggerTrigger PinTrigger Spring

~ t c " K e Her...

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OPERATING INSTRUCTIONSWINCHESTER LIGHT AUTOMATIC RIFLE

CALIBER .224Loading the MagazineLoad magazine by normal method of pressing cartr idgesinto place under the l ips of the magazine with thumb.Capacity - 20 cartridges in staggered row.Inserting the MagazineInsert the open end of magazine into rectangularopening in underside of stock. Force i t upward inplace unt i l i t i s held by magazine catch. When themagazine is locked in place the magazine catch wil lbe flush with the outside of the t r igger bow. Makecertain tha t the magazine i s securely locked.To Remove MagazineThe magazine may be released by grasping the magazinewith the ~ e f t hand with the thumb in the t r igger bowcompressing the catch forward then exert ing a downwardpull on the magazine removing i t from the guard. Anal ternate method is to push the magazine catch forwardwith the r ight hand thumb and pul l the magazine downward with the l e f t hand out of the t r igger guard.Feeding the Cartridge into theChamber and Cock the HammerWith the safety catch in the "off" posi t ion, grasp thehandle of the operating sl ide with the r ight hand andpull i t ful ly back cocking the hammer. Release thehandle of the operating s l ide and allow the s l ide togo forward. This car r ies the cartr idge into thechamber and the gun is now .ready to f i re when thet r igger is pulled.

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Change Lever - Full Automatic FireThe change lever i s located in the l e f t hand sidefront end of the receiver. This lever allows these lection of fu l l automatic or semi-automatic f i re .

n this 8 v e ~ i s turned forward it wil l exposeh ~ le t t ers "F.A." In this posi t ion on pul l ing thetr igger the gun wil l f ire continuously and automat ical ly unt i l the t r igger i s released or magazinebecomes empty.Change Lever - Semi-Automatic FireWith the lever turned to t he rear it wil l expose thele t ters "S.A." In this posit ion it wil l f i re semiautomatic. On pul l ing the t r igger the gun wil l f i reone shot and stop; to re f i re the t r igger must be re -leased af te r each shot and then pulled.

CHAIIGE LEVER

.4'_"== -"--"' '' r ,., .. .

Bolt Hol d Open DeviceWhen the l as t shot i s f i red the magazine follower t r ipsthe bolt stop and t he bol t i s automatically locked open.When a new loaded magazine i s inserted in the guard andlocked in , the bol t stop may be released by pul l ing theslide handle rearward. This wil l release the bol t stop; the s l ide handle can then be released t ravel l ing forward,the bol t feeding a shel l into the chamber.

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To Pull Operating Slide Backand Lock i t in Open Posit ionPull the operating sl ide to the rear with the r ighthand. With t he l e f t hand press the bol t stop,lo cated on the l e f t hand s ide center of the receiver,outward, le t t ing sl ide forward easi ly unt i l bol tcontacts bolt stop. In this posi t ion the actionwill be locked open unt i l released . By puli ing thesl ide handle to the rear the bol t stop wil l releasethe bol t and allow i t to return to f i r ing posi t ion.

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S f ety 11 On"Pull sa fe ty catch out and rotate to the l e f t unt i li t engages in the sa f ety notch on the back end ofthe receiver. This movement cams the hammer downoff of the sear notch and closes the openingne e ssary for h mmer to pass through th r-ceiver when f i red . With the safety in this posit ion the opening on the side of the receiver isclosed preventing the entry of sand, water, orforeign matter .

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Safety "Off"Raise s a'f e ty catch s l ight ly ...Jith thumb and pressi t down to the r ight . This movement opens theside of the receiver to perrait normal bol t move-ment. The gun can now be f ired.

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FIELD STRIPPING INSTRUCTIONSWINCHESTER LIGHT AUTOMATIC RIFLE - CAL . . 224

l . Pul l the sl ide handle to the rear and return toi t s forward posi t ion. This movement wil l cock thehammer./2. Put safety on.

3. Compress front band re ta iner with the thumb, a tthe same time pushing the front band upward withthe f ingers approximately 1/2" . Then remove handguard.

4. P u ~ l front band clear off stock.To Remove Complete Action From StockGrasp the front end of the barrel with the l e f t handholding the grip of the stock firmly with the r ight .Li f t barrel up in an arc, it pivoting on the uppertakedown plate a t the rear end of the receiver unt i li t comes clear of the stock. Then l i f t out and forward.At this time the metal components are one completelyassembled uni t and cannot accidenta l ly become disengagedone from the other.To Remove Tr i gger Guard Assembly from ReceiverPut safety in "off" posit ion. Pull t r igger releasinghammer. Slide guard assembly to rear of receiver andl i f t out. Remove rocker arm by pivoting it rearward tore l ief cut then ra is ing it out of the receiver .To Remove Operating Slide Spring and Guide RodGrasp action in l e f t hand by the gas port holding thesl ide in a forward posi t ion. With the r ight hand grasp

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the front end of the operating s l ide spring and guiderod and pul l re a rward suff ic ient to re lease the plungerfrom the operating s l ide ; then pul l downward and outfrom hole.To Remove Operating SlideMove sl ide to the rear exert ing a s l ight ly upwardpressure approximately 1/2" from rear sl ide posi t ion,causing the sl ide to r ise into a re l i e f cut . Movesl ide outwardly to the r ight to c l e ~ r the tr&ck inwhich the rear shoe t ravels . Then move s l ide to therear unt i l i t stops against the front end of the re-ceiver. A s l ight upward twist of the handle wil lcause the sl ide to come free from the barrel lugs anddrop from the receiver and barre l .To Remove Safety SleeveRaise the safety catch and rotate it to the extremele f t . This wil l permit the safety sleeve to beremoved from the rear end of the receiver .To Remove BoltUnlock and s l ide bol t to the ' rear unt i l l e f t hand lugstops at end of lug t r ~ c k in receiver . Move bol t tothe r ight and remove from rear end of receiver .

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TO REASSEMBLE GUN AFTER FIELD STRIPPINGTo Reassemble BoltCheck f i r ing pi n lug to makG certa in that it is inl ine with the bol t lug by rotat ing i t to the r ightedge of the f i r ing pin cut in the bol t . R o t ~ t e receiver assembly to bring r ight side of receiver up.Place bolt in safety sleeve hole with i t bearingon the up s ide. Push forward unt i l bol t is stoppedby the front end of the safety sleeve hole. Graspthe exposed lug and shake i t s l ight ly allowing l e f thand lug to drop into lug s lo t in receiver . Pushbolt forward and into place .

Caution: I f the lower lug does not readilydrop into place this is due tothe fact tha t the lug on the f i r ingpin has moved re la t ive to the bol tlug. To correct th is , turn receiverupside down, take the guide rod andpush the f i r ing pin lug downward into i t s proper locat ion. Then turnreceiver to the r ight ( r ight sideup) and the bol t wi l l drop into i t sproper locat ion. Push bol t forwardto locked posi t ion.

To Reass emble Safety SleevePlace safety sleeve in the rear end of the receiverwith safety catch pulled out as far as possible androtated to the extreme l e f t on top of the receiverle dge. Push safety sleeve in unt i l it stops againstthe forward shoulder of the safe ty sleeve hole. Pullsafety catch up and rotate safety sleeve to the extreme r ight , re lease safety catch locked in the "on"position.Place timing bar in semi-automatic posi t ion .

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To Reassemble the Operating SlideMove bol t lug to rearmost posi t ion. Engage operatingsl ide onto exposed bol t lug and r ight t rack on barre l .Turn sl ide handle down unt i l it picks up the l e f t handtrack on the barre l . Push sl ide forward for approximately 1/2" by exert ing pressure on i t . The shoe onthe sl ide wil l then drop into the re l i e f cut in theside of t he receiver and downward into the lower t rack.Push the sl ide forward.To Reassemble Operating Slide Spring and Guide RodInsert operating sl ide guide rod into operating sl idespring. Place spring andspring hole in receiver.fingers in the r ight handthe spring onto the guidet ing sl ide guide rod intosl ide .

rod into operating sl ideHold the spring with dwand feed approximately 2" ofrod, then place end of operare ta ining hole for same in

Caution: I f , on assembly it is attempted topush the spring into the hole inthe receiver, it can become bent ormutilated.

Turn receiver bottom side up and place trunnion onrocker arm in rocker arm hole in receiver with endof clearance cut on r ight hand side of receiver .Drop in place and rotate forward against timing bar.To Reas s emble Trigger Guard AssemblyWith receiver bottom side up, place guard assembly intobottom side of receiver with end of hammer in l ine withrear cut in receiver . Place guard in receiver unt i lstop shoulders on guard contact bottom of receiver . Pushguard assembly forward unt i l i t comes in contact withstop in receiver and magazine cuts in receiver and guardare in alignment. Check and make sure tha t rocker armis located properly between the end of timing bar andhammer catch .

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Hold action in the l e f t hand holding the guard forward with the fingers against the thumb on the f rontend of the receiver. This is necessary to hold thetwo components together.Place the rear end of the guard against any sta t ionaryobj ect . Place the l e f t hand on the bar re l fOrYJard ofthe gas pis ton pushing the act ion against t ~ e sta t ion-ary object . With the r ight hand pul l the sl ide to theextreme rear cocking the hammer. Return the operatingsl ide with the hand to i t s forward posi t ion. With thehammer cocked the guard is locked into i t s posi t ionand the complete gun assembly wil l not come apar t , onlywhen the hammer is released.

T ke t he s tock in r ight hand. Grasp the act ion nearthe piston and inser t rear end of guard into stockunti l end of receiver contacts upper takedown pla te .Using care hook hole in receiver over takedown pin,then sl ightly press fore-end of bar re l downward in anarc into the stock, sl iding the hand to the f ront endof the barrel . Push downward unt i l act ion is s t ra ightin the stock. In performing this operation you wi l lfeel a normal spring tension between the takedown pinand the stop shoulders on the guard.

Caution: I f excessive force is required forrota t ing the action into proper posi t ion,check to ensure tha t units are properlyassembled and tha t there i s not foreignmatter lodged in stock or act ion.Slide the front band onto the f ront end of stock.W th the finger on the r ight hand compress the retainer and with the l e f t hand push the front bandto within approximately 1/4" to 1/2" of i t s f inallocation. Holding the gun in the l e f t hand and the

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hand guard in the r i gl t ,place hand guard on top ofthe stock with the rear tenons locked onto the receiver. In this posi t ion push the f ront band intoi ts f inal location.

Note: The f ront band re ta iner has locked the............. band into place./

The gun is now ready to f i re a f te r inser t ing amagazine and feeding a she l l into the chamber.

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TAKEL O:';4' , " 71 ASSEMBLY INSTRUCTIONS

To Disass emv.. . c:kRemove but t p la te un i t by loosening screws. Unscrewthe takedown stud s c r e ~ , , ) three or four turns , / then ",: Pthe bottom of the scretoJdriver. This o i l l ra ise "heupper takedown plate a moderate amount and rerllove i "sstem from the recess in the lower pla te . Then completely unscrew the takedown screw, remove and pul lout the u??er takedown pla te . The lower pla te canthen be pushed f O l ~ a r d and removed from the stock.The front band re ta iner can be driven out with anordinary punch.To Disassemble Butt Plate UnitRemove but t pla te from stock. Loosen and remove but tplate t rap door spring screw and spring. Drive outbutt pla te t rap door pin and remove t rap door ..

6! - I'10 ' '- .' t'11

64

6563..,.

TO AS SEMBLE B U T ~ STOCK ASSEMBLY~ o Assemble But t Plate Unit

62

Inser t but t p la te t rap door in posi t ion in but tplate with holes in alignment. Inser t but t p la te

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- - . -: : ' ~ E,=rev; : l ~ . . L . : ' ~ = r . . : - : ' ~? aLe, inser t b t t plate t rap door screw and t ightenwi th a sui table screwdriver.To Assemble Butt S t o ~Place but t plate uni t onto stock and t ighten but tplate screws. Drive the f ront band re ta iner intoplace. Inser t the lower takedown pla te in the stockand push to the rear . Place upper takedown pla teinto the hole in the stock and push i t into place.This wi l l lock the lower pla te into i t s posi t ion.Inser t takedown stud screw and t ighten securely.

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TO DISASSEMBLE BARREL-RECEIVER ASSEMBLYTo Di sassemble Gas Piston Bushing LockPlace the end of the guiclc rod under the t a i l of thelock a t the underside of the hole in the barre l andpry upw rd nd out al''l lock wil l spring into holeand can then readily be l i f ted out of the top.

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To Disassemble Gas Piston and Bushing Lock NutUsing the wrench furnished with the annorer ' s k i t ,loosen and remove the piston bushing lock nut . Thegas piston may then be l i f t ed out of the cylinder.

Note: Nonnally it should never be necessary todisassemble and assemble the gas piston,bushing nut, etc . during the l i fe of thebarre l .

To Disassemble Timing BarTip the gun with the l e f t side of the receiver up-ward. Put the change lever onto "F.A.". Holdreceiver with l e f t hand and with the r ight handspring bar upward s l ight ly and s l ide it b a ~ k unt i lthe lug on the bar comes out through the groovefor it in receiver . The timing bar spring andplunger wil l now be free to be removed from the"T" s lo t in receiver .To Disassemble Change LeverTo remove the change lever, place tapered end ofguide rod under the change lever f inger piece andpry upward releasing it from the plunger. Changelever can then be l i f t ed out . With the guide rodthe change lever plunger and spring can also beremoved from the receiver .

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To Disassemble Safety SleeveHold safety sleeve in h e l e f t hand and with thethumb remove spring tei, e; i on from safety catch pin.I t can then be pushed O \.1 t with the guide rod. Thesafety catch can now be l iZ ted f r om the lug on the'safety s leeve. The safety sleeve catch plunger andspring can then be removed. ITo Disassemble Front S i g h ~Drive out the s ight pin off front end of barrel .The front s ight can then be readily removed. Thefront barrel support and band can now be sl id offthe front end of the barre l .To Disassemble Rear SightPress it downward removing the spring tension fromthe s ight pin and push outward. This pin is heldin place by a re l i e f cut in the assembly.

Caution: To remove rear sight base or adjustfor windage - the s ight cut istapered so tha t with the bar re lpointing forward the s ight i s drivenfrom the r ight to l e f t . When assem-bling i t drives from the l e f t to r ight .

To Disassemble Bolt StopDrive out ro l l pin and remove bol t stop by pul l ingout and working it dm'lTIward so as to rel ieve boltstop spring.

Caution: When bol t stop comes loose spring isapt to f ly and get los t as it is freein retaining hole.

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57

58 59

60 1 "6(

68 67 68r ~

6652 3&.. 0 13

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48 iii 0 4946

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45

BARR EL -RECEIVER AS SEMB LY

25

~2 7 - 26

23

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TO ASS EMBLE BARREL-RECEIVER ASSEMBLYTo Assemble Gas Pi sto n Bushing LockInser t s t ra ight end of bushing l ock, from the front ,i nt o the s lo t in the cylinder and t he s lo t in thepis ton nut. Press thumb on the end of the lockinser ted, to re ta in i t in place. Lif t bushing lockup and rotate forward unt i l it snaps into the lockhole in the cylinder. Tap spring unt i l t a i l locksi t into place on the underside of hole .To Assemble Gas Piston and Bushing Lock NutInsert gas piston i n t o cylinder on bar re l and screwi n gas piston bushi ng lock nut unt i l i t contactsstop shou l der and one of the cuts for the wrench isin l ine with the notch in the gas cylinder.To Ass emb l e Rear SightTo assemb l e t h e base with the bar re l pointing forward, drive from r ight to l e f t . Lay spring on topof s i gh t , press sight downward unt i l s ight pinholes l ine up, drive pin in place. The pin shouldremain locked in posi t ion due to the recess in pin.To As semble Front SightFirs t place t h e front band on the barre l . Drivesight over key unt i l s ight pin hole l ines up, thendrive sigh t pin into place.To Assembl e Timing Ba rTip the receiver with i t s l e f t side up. Take thetiming bar s pring assembly (spring and two plungers)and inser t in t he top side of the "T" s lo t inreceiver . Lay the timing bar lug over the re l i e fcut in the receiver "T" s lo t . With the r ight handpress the timing bar down through the re l i e f cut by

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springing i t and with the l e f t hand s l ide the timingbar ahead approximately 1/8". With i t locked inth i s posit ion tak e the end of the operating sl ideguide rod and pul l the operating sl ide spring backi nto i t s position unt i l the plunger stops againstt he end of the change lever . Slide the timing barf orward le t t ing i t nap into i t s operating posi t ion .During the assembly of this component the c h ~ n g elever should be on "F.A." posi t ion.To Assemb le Change LeverInsert the change lever plunger and spring in t o t h echange lever plunger hole . Locate in posi t ion withthe end of the guide rod. Inser t the change leverinto the change lever hole in the receiver with thefinger piece pointing to the r ight . Push downwardunt i l the increased diameter on the lever reachesthe receiver then rotate to the front and compressinto i t s normal postion.To Assemb l e Sa f ety Sl eeveInsert the safety sleeve spring and plungerassembly into the p lunger hole. Place the safe tysleeve catch on top and compress unt i l holes l ineup. Push in safe ty catch pin; the recess incenter of pin wil l prevent i t from fa l l ing out .To Ass embl e Bo l t StopPlace bo l t stop spring in hole in bol t s top.Enter bol t stop in receiver unt i l spring contactsside of receiver . With armorer's assembly punchcompress spring and push bol t stop into receiverunt i l tool con tac ts wall of receiver . Pul lass embly punch out of spring while holding thebo l t stop in place. This wil l leave the springhal f in the receiver . The bol t stop can then bepushed fully into i t s location and the spring wil lsnap into the bol t stop spring hole in the receiver .

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The bol t sto ...... an be held in place w" th a 3/32" pieceof rod and then a standard 3/32 x 1" 11 pin driveninto the bo l t stop pin hole in the r l ceiver .Note: Each time this component i s disassemb l edand as sembled, a new ro l l pin should beused to obtain the best resul t s in prevent-ing it from jarr ing loose due to the lossof spring tension.

Alternate Method of Assembling Bolt StopPlace act i on in a suitable vise clamped by the barrelwith the l e f t side of receiver facing upward. Inser tthe bol t stop spr ing in spring hole in the receiver .Hold i ng bol t stop in posi t ion being cer tain that theangular surface is towards the muzzle, take a smallscrewdrive r and guide the opposite end of spring intothe spring hole in the bol t stop. The bol t stop isthen t ipped inward sl ightly and eased into posi t ionin the receiver so tha t the pin may be driven in , becer tain tha t spring has not been kinked when the bol tstop is eased into posit ion. Inser t bol t stop pinand drive into place.

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TO DISASSEMBLE MAGAZI NE ASSEMBLYWith a th in sc rewdriver or kni fe blade l i f t the backedge of t he ma i-;a zine bottom nnd s l ide i t: out. Removethe magazine " ,l r ing. Drop t he followel ' t o the bottomof the magaz l .e , t ip the n t end u p ~ ~ d . This wil la l l ow h ~ b k end of the f ol l ower co Come out betweenthe rear bottom of the magazine and the l ips that holdthe bottom in place. I

~ - - -

4037

----8TO ASSEMBLE MAGAZINE ASSEMBLYInser t t h e follower front end f i r s t thru the rearbottom of t he magazine. ~ should be used inassembling the magazine to make certa in tha t the endof the spring with the fu l l loop t i l t ing upwar d i splaced in f i r s t toward the rear of the magazine andres t s against the back end of the follower. Caut ion:The improper assembly of the magazine spring wil lprevent proper function of the follower and feedingof shel ls into the chamber. Compress the magazinespring and replace bottom. After reassembly make

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certa in tha t shel ls lay properly between thefollower and the l ips on the magazine. I f theshel ls are not rest ing in this position the bol twi l l not pick them up and f e them sa t i s fac tory .This condi t i on can be corrected by making certa intha t the spring has been assembled properly or byincreasing the angle s l ight ly on the f i r s t coi lof the spring tha t res ts against the follower.

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TO DISASSEMBLE GUARD ASSEMBLYGrasp the guard in the l e f t hand and push out thet r igger pin with the end of th e operating sl ideguide rod held in the r ight hand. The t r igger andhammer catch can then be l i f ted Out . Now place theguide rod under the hammer spring abutment with i tre s t ing on t a i l of guard, pry upward, sl ide theabutment rearward and remove the hammer springassembly. Push out the hammer pin using the guiderod. The hammer can then be l i f ted out . Thenpush out the magazine catch pin. Push the hammercatch in t r igger bow rearward as when normallyoperated. This wi l l release the catch and it canthen be l i f ted out .

32

70

33

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TO ASSEMBLE GUARD ASSEMBLYPlace magazine catch spring into spring hole. Putmagazine catch through top of guard, push downwardand forward unt i l i t snaps into posi t ion. With the. f inger inside of the guard against the magazinecatch and the thumb outs ide, press forward unt i l thehole l ines up with hole in guard. Inser t magazinecatch pin. Put hammer through top of guard l in ingit up with hammer pin hole .. Inser t hammer pin.Grasping the guard in the l e f t hand take hammerspring assembly and locate the hammer spring guiderod in recess on underside of hammer. Feed abutmentup angle on top side of guard unt i l i t snaps intoplace. Function hammer up and down to make suretha t abutment and guide rod are properly located.Assemble the t r igger spring to the t r igger and in-ser t the hammer catch spring into the rear hole inthe t r ig ger . Assemble the hammer catch to thet r igger f i r s t compressing the rear spring with theend of the guide rod to allow assembly. Take thisassembly and inser t i t into the guard as near therear as possible to make certa in that the t r iggerspring is properly located in the cut in the guard.Holding the guard in the l e f t hand with the thumbagainst the top of th e hammer catch press downwardunt i l the hammer catch and t r igger hole l ine upwith the t r igger pin hole in the guard. The use ofthe tapered slave pin would help to fac i l i t a te theassembly of these components . Push t r igger pininto t r i gger pin hole in guard.

Caution: Do not pul l t r igger and re leasehammer allowing it to s t r ike guard.Prevent this from happening withthumb when checking function.

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TO DISASSEMBLE BOLT ASSEMBLYWhen using disassembly k i t furnished armorer, placebolt in f ixture . Turn wing screw and compress ejec tors l ight ly . This wi l l remove the tension from the ext rac to r . With a sllial l screwdrive r compress extractorplunger. This wil l release the extractor and i t canbe l i f ted from the bol t . The extractor plunger andspring may now be removed. Release the wing screw inthe f ixture unt i l the spring tension on the ejec torceases. On l i f t ing the bol t out of the f ixture theej ector and spring may be removed. Rotate the lug onthe f i r ing pin to the extreme l e f t ; this wil l causei t to be released and can then be withdrawn from therear end of the bol t . The f i r ing pin spring i sthreaded onto the f i r ing pin through the spir.al groovesa t the rear end of the f i r ing pin . I t normally shouldnot be necessary to remove this spring due to theposs ib i l i ty of i t becoming mutilated. In assemblinga new f i r ing pin a new spring should be assembled toi t .Alternate Disassemb ly Me thod i f Fi xture i s not AvailableTurn the f i r i ng pin lug i nto i t s f i r ing posi t ion tothe extreme le f t of the l e f t hand lug. Place the bol tbetween t he jaws of a vise with an approximate .010 orgreater piece of sh im in f ront of the ejector . Thiswil l rel ieve i t s tension from the extractor stem. Witha small screwdriver compress the extractor plunger andremove the extractor . Loosen the jaws of the vise andremove the ejec tor and spring, extractor plunger andspring, and the f i r ing pin in the normal method.

i"18

120;;::a16 n

.._--

22

21

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TO ASSEMBLE BOLT ASSEMBLYInser t the f i r ing pin from the rear into the f i r ingpin hole compressing the f i r ing pin spring and rotatethe f i r ing pin lug to the r ight in l ine with the bol tlug. Inser t the ejec tor and ejec tor spring assemblyinto the ejec tor hole with the extractor cut in avert ical posi t ion from the bol t lugs. Take the ex-t rac tor spring and plunger assembly and inser t in theextractor plunger hole. Place bol t with componentsas assembled into f ixture and compress ejec tor byturning wing screw the amount necessary to locate theejec tor below the outer rim of the bol t . Take the.160 slave pin and pass i t through the extractortrunnion hole. In doing this the ejec tor wi l l berotated to proper alignment. Place extractor in bol tholding the f ixture with the l e f t hand with the thumbon top of the extractor . With a small screwdriver inthe r ight hand, compress the extractor plunger withthe thumb pressing the extractor in place.Release the wing screw in the f ixture and remove thebol t .Alternate Assembly Method i f Fixture is not AvailableAssemble the f i r ing pin, ejec tor and spring, and ex-t rac tor plunger and spring in the normal manner. Turnthe f i r ing pin to the l e f t of the l e f t lug on the bol tin the approximate f i r ing posi t ion. Place the bol tbetween the jaws of a vise with a piece of shim inf ront of the end of the ~ j e c t o r , compress ejec tor toi t s locat ion. (Note: Cut in e jec tor l ines up withextractor hole) . With the thumb on top of the extractor ,with a small thin screwdriver or knife blade in ther ight hand, compress the extractor plunger with thethumb pressing the extractor into place.

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The armorer 's ki t consists of (1) bol t holding fixtu re , (1) piston nut wrench, (1) . 160 Dia. slavepin, for extrac to r pin holes anG pin holes in guard,and (1) bolt lock spring assemb l y tool .The tools pictured are not necessary for assemblyof the we apon and are furnished as a convenienceonly. The weapon can be disassembled or assembled

Iwith any standard tool avai lable .

(0)... }i Is :lJ

BOLT HOLDING FIXTURE

rr~

PISTON NUT WRENCH

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.160 SLAVEPIN

BOLT LOCK SPRINGASSEMBLY TOOL


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Caliber .224 Winchester E2 Ammunition

This newly developed cartr idge has the followingcharacteris t ics :

Bullet: 53 grain Full Metal CaseIMuzzle Velocity: 3300 f t /sec .

Max. Ave. Chamber Pressure: 52,000 psiBarrel Length: 20"Max. Cartridge Overall Length: 2.170"

The following figures show in deta i l the characterist i c s of this ammunition:

Photograph showing comparison of the Caliber.224 Winchester E2 Cartridge to other mili tarycartr idges .Drawing of maximum cartr idge and minimumchamber dimensions.Drawing of 53 grain Full Metal Case bul le t .Tabulation of veloci ty, energy and mid-ranget rajectory a t range to 500 yards.Trajectory curve showing bul le t height aboveor below l ine of s ight for both low and highLight Rifle s ight set t ings a t ranges to 500yards.

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o

- ~

=-M

=--C"l

= - ~

Cartridge Name:Bullet Weight (Grains):Muzzle Ve loci ty ( f t / s ec ):Muzzle Energy (f t - lbs )Rif le:Rif le Weight Loaded ( lbs ) :Magazine Capacity:Weight of Rifle & 200 Rds.of Ammunition ( lbs ):

COMPARISON OF MILITARY CARTRIDGES

AT-!'

Cal. .224 Winchester E2 7.62 mm Na to Ca l . 30 M2 A.P.53 150 . 1663300 2800 "- 27701280 2610 2825Winches ter Light Rifle M-14 M-l5.5 9.7 10.120 20 810.0 19.2 21.5


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MAX. CAI '2TRIDGE1--- - - - - - - '2,17 0 - - - - - - - - - ~

~ $, ~ S ~.35 4

. 330 D A T U M$ ~

. ' 2 5 ~ CYl...

r ~ O ~ ' " iFAC

.......---1.000--.. .;0 ...........--1. ~ G - - - - - - ~1- - - - - - \. 4 ~ < o ~ - - - - ~.......------ \. &51 20 - - - ~o~ - - - - - - - - 1 . '7 0

tv) I . CHAM BEl

winchester lightweight military rifle caliber .224 usa 1958

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