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*PM 22-8Fmm Mwna~No. 23-8 I

HRADQUARTERSDEPARTMENT OF THE ARMYWasmmo~, D.C., 7 Maa,1966U.S. RIFLE

7.62MM, Ml4 AND M14E2

Cen~ne 1 . INTRODUCTION -hP u r p os ea n d so op e_____..._.___________._._ . . ..__..__. _._Im p or ta n ce of &ch an loa l tr a in in p ______________... . .. .___.De w lp t lon of th e ri fle s____________----__-_________..____Ge m e r a l&t a _____________________-----..-_________.____

2. MECHANICAL TRAININGGe n e r a l..----.-____________.----._________......._.....Cl ea r in gt h eWe __._____._____-..---.-._-_______....____Disa sse m bly into th re e ma in gr ou p s________. ._ . . . . .___.. ..Assem bly of th e th re e m ai n gr ou ~_.__.__.______ _.. .Disaa semb lyof theb ar re lan d~eiver gmu p . . ._. .. ____. .._Asse m bly o f t h e ba r r e l a nd receiver group____.._. . ..__._..Diaa asem bly of the gas sys t em an d h an dgu ar d____._. .__. .._Rep lac ing the s ta bi l iwr assem bly of th e M14E2 r i f le__. .._.._Rem oving th e s ta bi l ize r aeeem bly of th e M14E2 r i f le_ _ _ _ __ _Rep lac ing th e s ta bi l l se r aesem bly of the M14E2 r l l le___. ._. ..Dis ss se m blr of the m a ga zin e__.____________ . . . . . . ._______Aa se m b ly oft h em a ga si n e..._____-___.-.________.._...._.

3 . OP ERATION AND FUNCTIONINGLoading the magaslne (out of the rifle)___ . . .__.. .___.. . . ._Loa d in g th e m ag ti e (in th e r l&)__._._. . . . ._.. . .._._.. ._Losdingsndunloadingtherif le__. . . - -_____. __. .

I I . F unc t ion ing8e m is u t om a t io _.._-__.._-------_....--...--.-..Au t om a t i c ( r i fl e a e qu ip pe d wi th se l e c to r ) _._

Ca~nxa 4 . BTOP PAGES AND IMMEDIATE ACTION8~ p ~e e _______....___.._.._-..-.--______.............Im m ed ia t e a ct io n --.-.-...._-_-..-.--....--_._..---_..__

5. MAINTENANCEGeneral_.____________-___..----...--_.___....__..._....Cleanin g ma ter ia ls , lub r ica nt s , an d eq uip men t . _ . . .__ _. ____.Cl e a n in gt h er i8 e__-..---.-.---..____________..._...~.~~~No r m a lm a in t en sn oe ____....._-______________--_..~__~~_.Bp ec ia lm a in t en a n ce ___...______________.........___._...

6. AMMUNITIONGeneral________.____ . . . .._ _______________ . .._.____....-D~ cr ip t io n .__._____________.-..__-_-_-_________.______.P a c ~g in g___._____.._____._._..-----_-______._......_._Car e . ha nd l ing, sndp rea en ra t ion __. -- ___. .__

7. ACCESSORIESM2 b ip od ___..--...---...______________--.-.---__.__-._M 6 ba yon e t kn i fe a nd M 8Al ba yon e t kn i fe s c a bb a r d . . _ _.M76g r en a d ela u n ch er _____....---..-.--...--...__--_.___M15g r en a d el a u n oh er si t e______._._____.----............-Ml2 blan k 6r lng a t ta chm ent an d M3 br eech sh ie ld___. ._~ .. .Win t er t r ig ge r k it _____..._ ____.._.__...~~__..__..

AP P E ND IX. R E F E R E NC E S____...._____..___---..---.........-.---

1234

Pam2334

5Y89

10111213141516

66779

10131314141414

17 1918 1919 1920 1921 26

2223 282924 3025 3026 3227 3328 3929 4030 4031 4032 40333435363733._

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CHAPTER1INTRODUCTION

1. Purpose and Scopea. This ma nua l is B guide for comm an ders an d

instr uctor in presenting instru ction in theme-chanical opera tion of th e Ml4 an d M14E2 rifleaIt include+ B detailed description of th e rifle an dits general chuacta ristics; procedur es for deta ileddisassembly an d assembly; a n explan at ion of func-tionin g; a discussion of the types of st oppages an dth e immediat e action a pplied to reduce th em; a de-scription of th e am mun ition; and instr uctions on

th e care, cleaning, an d handling of each weaponand its ammunition.

b. Mark sma nsh ip tr aining is wwxed in FM 23-71 and FM 23-16.

c. The ma teria l cont ained her ein is applicablewithout modificat ion to both nu clear an d nonnu -clear warfare.

d. Users of this ma nua l ar e encour aged t o sub-mit recommended changes or comments to improveth e publicat ion. Comm ent s should be keyed toth e specific page, para graph , an d line of the text

CARTRIDGE CLlP GUIDE REAR SIGHTELEVATING KN OB SCREWFLASH SUPPRESSOR

NET STUD

TRIGGER GUARDOPERATING ROD FRONT SIGHTWINDAGE KN OB NUT

I CONNECTOR ASSEMBLY ISELECTOR

SLING

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in which th e change is recomm ended. Reascmsshould be pnwidsd for each comm ent t o insu re un -denstan ding and complete evaluat ion. Comment sshould be forwar ded direct to the Comma ndan t,United Stat es Arm y In fantr y School, Fort Rsn-ning, cfa, 31265.2. Imper t rm m of Mechanica l Tra in ing

The i f le s th e Infan tr yman s basic weapon. Itgives him an individual an d powerful capabilityfor combat. To benefit th e most from th is caps;bility, the Infan tr yman mu st develop two skills toan equa l degree: he must be able to fire his weaponwell enough to get hits on bat tlefield ta rgets, a ndhe must lmow enough about its working part s tokeep it operating. The Infantr yman att ains hisfiring skill in mwksman ship tra ining. He learnshow to keep his rifle in opera ble condition th roughmechanical training.3. Descr ipt ion f lho Ri f les

a. Ml4 R@!e.(1) Th e U.S. rifle, 7.62mm , Ml4 (fig. 1) isB lightweigh t, air -cooled, ga+opsra ted ,

ma gazine-fed, shoulder weapon. It is de-signed prim ar ily for semiau tomat ic fire.

(2) When employed as an automa tic r ifle, th eselector and biped hi2 must be installed(fig. 2).(3) The flash supp ressor is designed with awide rib on th e bott om to redu ce mu zzleclimb and t .he amount of dust raised bymuzzle blast.

,.:.,_,. ,.._

(4) The lug on th e rear of the flash suppin s-sor is used to secur e a bayonet, B grena delauncher, and B blank firing a tta chment .

(5) The spindle valve is used when laun chinga grena de t o prevent gas operation of th erifle, th us avoiding dam age t o th e weapon.

b. Ml.&% RijEe.(1) The U.S. r ifle, 7.62mm, M14E2 (Iig. 3)

is an air -cuoled, ga s-opera ted, ma gazine-fed, shoulder weap on. It is capa ble ofsemiau tomat ic or au tomat ic fire; how-ever, it is designed prim ar ily for au to-matic fire. It featur es a stabilizer assem-bly, modified bipod, front an d rea r ha nd-grip, str aight line stock, a nd & ru bberrecoil pad.

(2) The M14E2 stock group is th e str aightline type with a fixed rea r ha ndgr ip an da folding front h snd erin which lies flatalong t he bott om of the stock wh en notin use. The location of the front hand-grip csn be adjusted to one of five posi-tions in l-inch incremen ts to wxommo-date all gunners The rubber reooil padreduces the effects of recoil. The hingedshoulder rest provides ver tical cont rol ofthe butt end of the rifle. The butt swivelpivots 26 to the left for ease of car ryin g.The st abilizer assembly consists of a per-fora ted steel sleeve which slides over t heflash suppressor and is fastened to themuzzle over the bayonet lug by a screwan d 8 locknut . The stabilizer pr ovidesmu zzle stability an d redu ces recoil.

SELECTOR

Hlh GED SHOUL DER REST

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(4) The M2 biped is modified by the additionof a sling swivel and a longer pivot pinto accommodate the swivel.

(5) The M14E2 utilizes a sling with an extrahook assembly. The portion of the slingbetween the handgrip and the biped pro-vides additional muzzle control duringfiring. The portion of the sling betweenthe front handgrip and the biped sllows

wtighfs n PowId (approm):Ml4 rifleith full magasineand cleaning equipment___. 11%Ml4 rifle with full magazine,cIesning equipment, elector,and biped___.._..__._.... 13Empty maw%i~~e___._____.. !4Full magszme (with ball am-munition)._...--_______~_ 1%

Cleaning equipment--------_ 76M2 b~pod____....______._.. 1%M14E2 rifle with fuU msgk

einP.-----------..__..-_____ 14%STABILIZER ASSEMBLY LONG SLING

the sverage firer, by applying rearwardpressure on the front handgrip, to in-crease the pressure of the biped on theground to approximately 35 pounds, IB-ducing dispersion considerably. Whenthe wespon is csrried at sling arms, thesling must be disconnected from thehandtip assembly.

IFlED EIPOD M2

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TripgEr Pull in Pa&:Min im u m ____._____________ 5.5Maximum_._____. ____.___.. 7.5

Muzzk veloc&__._.___________ 2,300f.p.s. (853m.p.a.).

Cyclic Rote of F ir e (r o u n d 8 p er 7 0 & 7 5 0minute)

Ralcs o j F ire . (Th em 08 bemaintained without danger tothe irer, or darmge to hewespa) :Semiautomatic (rounds per

minute) :1mite______--_._.---02 mit&3____-._-.---..05mit.m_____-..----.-010 mftea_____________ 2015 mfnt&3_________._-_ 2020 mite._________..._ 2030 mfnutea (or more)__.. 15

Automatic (mu&3 per min-ute) :

1 miute_____.__...____ 602 mfte___.___..._._ 50

5 m it es _______._...._ 4 010minutea____.___.__._ 3015 mfntes_____________ 302Omiiez.____. _ 2530 mita (or more) _ _ _ 20

R a n g e i n Y & n :M a x i m u m effective (semiau- 460

tomatic, without biped).Maximum etrective (semisu- 700

tomatic, witb biped).Maximum effective (autome- **460

tic, with biped!.Maximum__._______._______ 3725

Ammunirimt....____.-..-______ see ohspter6.DqlEndMu:

Cyc li cr a t e____ ___. _.___ ____ themteatwhiobtheweapon fires auto-matically.

Maximum effective mmre___.. the aeat& distance

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CHAPTER 2MECHANICAL TRAINING

5. Genemla. The individual soldier is au th orized to disas-semble his rifle to the extent called field stripping.

Chart I shows the parts he is permitted to dis-sssemble with and with out super vision. Theamount of dbly he is perm itt ed to performwithout super vision is sdequst e for norma l m ain-tenMoe_

b. The frque?ky of dkeasee7nb&nd aS86lnb1y8hdd be kept to a m m m .um con&t ent ud h m a&teMn ee and im tnlctiollal re+-. constantdiibly causes excassive wear of th e par ts an dleads to th eir ear ly onser vice&ility an d to ina c-curacy of the weapon.

c. The rifle has been designed to be taken apartand put together easily. No force is need ed if itis diibled an d -bled corr ectly. Theparts of one rifle, except hebolt, m ay be in ter-changed with th ose of an other wh en weasar y.Bolta 8hadd n.evt?~ e 6nteTchm ged fm 8CZfetyWU.XUW.

d. As the rifle is di -bled, the parts shouldbe laid out fmm left to right, on B clean su rfaceand in the order of removal. This makes assemblyeasier beesuse t he pa rt s w-e assem bled in th e x-e-veme order of di saseam bly. The na mes of t hepar ts (nomen clat ur e) should be ta ught along withdisassembly and assembly to make further instruc-tion on the rifle easier to under&and.

6. Clearing he RiiThe first step in handling an y weapon is to clear

it. To clear the rifle, first att empt to engage t hesafety. (If una ble to place the safety in th e safeposition, continue with the second step of remov-ing t he magazine.) Remove the magazine by plao-ing the right thumb on the magazine latch and6

curl the rema ining fingers ar ound the front of themagazine. Press in on the magazine latch, rotatethe base of t he magazine t oward the muzzle endof the rifle (fg. 4), an d rem ove it from th e ma ga-zinc well. With the knife edge of the right han d,pull t he operating rod handle a ll the way to therear , reach ~croea the receiver with the right thu mban d prwa in on th e bolt lock (fig. 5). Verify the

SEP ARATION INTO THREEMAIN GR OUP f._____._ X

DISASSEMBL*:BARREL AND RECENE R

GR OU P __________________ XF r on t si gh t ______._______ __.___ .___.Rear si gh t _.____.._______ ______ XFla sh au pp-r.._...___ . . . .._____.sp in dle va lve_______.____ ______ ____.sfxurelease________...___ ______ x8aleotar nd se l e c to r

sh a ft lo ok _____________ ______ XBipcdM2__...______..._ XC o n n e c t or a s s e m b l y

(sp r in g an d p lu n ger )____ __.___ _____Bolt lock________._______ __.___ XCa r tr id ge clip gu id e_____.__..._..._.Op er at in g md gu ide - __. .__ .___.Ba~~lfromreceiver.. ._._ ___.S ta b i l i ze r a s se m blv

M14E2__.____: XS TOC K GR OUP : I It oc k ~n e r ____._..._.___....__._...

Uppe r s l ing swive lb n r ck et _...___..._._--...-.-.-.-.

St ock fer r u le__.- ___. . ._.MAGAZINE_...___...._--__ XBO LT __._-_...-.-....---..- ____.. X

Bol t ro l le r f rom bol t s tu d_ ._FI RIN G MECH ANISM_..._ . . ._._ X

Magasinelatoh._.___.. ._.. ._Sea r fr om tr igg er __._... ._.. .._... .. .

-w

-.

._.

.-

._

tz!%%F-

XXX

XXXXXXXXXX

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safety, tilt the rifle, and look inside the chamberand receiver to insure that they contain no rounds.

7. Disassembl y nto Three Main Groupst z.The th ree main grwps are the firing mecha-

nism, th e barr el a nd r eceiver, an d th e stock.b. Aftar th e rifle is clear ed, the opera ting par ts

should be forwa rd for disaa semblg. To do th is,pull back on the opera ting rod ha ndle an d allowthebolttogoforward

C. To remove t he Siring mechan ism, grasp th erear of the trigger gusrd with the thumb an d fore-finger of your right ha nd a nd pull downward an dout ward unt il the mecha nism is released (fig. 6).Lift out the firing m echa nism.

d. To mpara ta the barrel and rwaiver from t hestock, lay the weapon on a flat surface with thesights up and muzale to the left. Grasp the re-ceiver with the left hand over the rear sight andhr ise th e rifle L few inches. With th e right ha nd,strike down on and grasp the small of the stock,mpnra ting t he barrel and receiver from the stack.The thm main groups are shown in figure 7.

e. The oompcwmta of the M14E2 rifle am shownin Iigure 8.

8. Assembly of Le Three Main GroupsCZ . lam th e ban-al and rtwiver group on a flat

sur face, sights down. Pick np th e stock group a nden- the stock ferru le in the front band, tha nlower the s&k group onto the barr el an d receivergroup.

b. Open th e tr igger guar d an d place the firingmechan ism st ra ight down int o th e receiver, III&-ing sure that the guide rib on th e firing mechanisment ers t he recess in the receiver (fig. 9). Place thebutt of the weapon on the left thigh, sights to theleft, insur ing the triggw guard has cleared thetrigger. With the palm of the right han d, striketh e tr igger guar d fully engaging it to th e receiver.

Fi mm 5 . L a c k i ng t he Bol t t o t he row .

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A. RIGHT METHOD 8. WRONG METHOD

LJ \FIRING MECHANISM

ci

BARREL A ND RECEIVER GRbUP

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BARREL A ND RECEIVER GROUP

STABILIZER ASSEhdLY

M2

7 -

9. Disassembly of the Raml and Receiver& UP

a. R em a v~ t h e f 7m m ect o r A m n b l y . Placeth e barr el a nd receiver group on its left side withthe operat ing rod hrr ndle up and t he muzzle aw&yfrom you. On rifles modified for selective firin g,pregs in and tu rn th e selector unt il th e fsce ma rkedA is towar d th e winda ga knob (fig. 10). Withth e bolt. closed, place t he r ight th um b on t he rea rof th e conn ector assem bly, th e first finger on thesear release bracket and the second finger inside therea r of th e receiver (fig. 11). Pu sh forward withthe thu mb un til the forwar d end of t he assemblycan be lifted off the connector lock with th e thu mban d forefinger of th e left ha nd (2, fig. 11). (Noteth at th e rifle shown iu 1,2, an d 3, fig. 11 ha s notbean modified for selective firing.) Tur n th e con-

17wo w--2

n&r aexwmbly (3, f?g. 11) clockwise un til th eelongat ed hole in the conuector assem bly is alinedwith t he elongat ed stu d on th e sear relenee. Lowerth e front end of th e conn ector assem bly and liftthe rear end off the elongated stud of the searrekase.

b . R e m m i n g t h e O p en z t k g R o d S p r i n g a n dO p em t k g R o d S p r i n g G Gd e . Place t he barrelan d receiver group on a flat surface, s ights down,mu zzle to th e left. With your left ha nd, pull to-ward the muzzle on the operat ing rod spring torelieve pr essu re on th e connect or lock (1, fig. 12).With your right forefinger, pull th e conn ector locktoward you an d, allowing th e opera ting rod sprin gto expand slowly, disconn ect an d remove the oper-ating rod spring and operating rod spring guide(2, fig. 12). Sepa ra b th ese two pwts .

C. R em o vi n g t h e O p er a t in g R o d . T u r n the bar-rel and receiver group so the sights BIBup and themu zzle is pointin g IDVCL~rom you. Pull back th eopera ting rod handle un til the guide lug on its in-side sur face is alined with t he disassembly notchon th e right side of th e receiver. Rota te th e oper-ating rod downward and outwar d, t hen pull it toth e rea r, disengaging it from th e opera ting rodguide (fig. 13).

d . R enwvi~ the Bo l t . Grasp the bolt by theroller a nd, while sliding it forwa rd, lift it upwa rdand outward to the right front with a slight r ota -ting motion (fig. 14).

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6. RipG ield Sttipped. The parts f the bar-rel and rweiver group in their order of disassem-bly aare hown in figure 15.10. Assembly of the Barre l and Receiver

hvPa. Re$&.ng ths Lb!& Place the barrel and 1~

.caiver on the table, sighta up, muzzle pointing

amy from pm. Hold the bolt by the roller andlocking lug and place the rear of the bolt on thebridge of the receiver, firing pin tang pointeddown. Turn the bolt slightly cmntmolockwiseuntil the tang of the firing pin clears the bridge_Guide the left locking lug of the bolt into its grooveon the left side of the receiver. Lower the rightlocking lug on its bearing surfam and slide thebolt halfway to the rear.

. .. Y

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-I/

F4pwe 1s. Rmndnp ownz t f n9 rod.b. Repl&~ th e Operat ing Rod. Holding the

opera ting rod at t,he ha ndle, place t he front endinto t.he opera ting rod guide, an d position th e rodso th at th e rcce~~ in the hu mp fits over t he boltroller. Turn the operating md to the left un tilth e guide lug fits into the disassembly notch on th ereceiver, th en move th e opera ting rod forwa rdunt il th e bolt is closed.

c. Replanng the Operating Rod Sprnq andOperating Rm-2Spring &.%e. Turn the barreland receiver over so the sights are down and t hemu zzle is to th e left. Place the opera ting redsprin g guide into th e opera ting rod spring, h um pup, and feed the lease end of the spring into theopera ting r od. Gras p th e sprin g and guide withthe left han d and compress the spring un til the

Figure4. RemMthg theb&t.

hole in the guide can be alined with the connectorlock. Lower th e guide and push the conn ectorlock in with th e right th umb (fig. 16).d. Rep7min.g the Conntwtoi- Assembly. Placethe barrel and receiver on its side with the oper-at ing r od handle u p, mu zzle away from you.Placa t he elongat ed hole in the rear of th e con-nector a ssembly on th e elongat ed stu d on the scarrelease (1, fig. 17). Place the thumb of the rightha nd on the rear of the conn ector assembly, thefirst finger on the sear release bracket, and thesecond finger inside the rear of the receiver.Push ing toward the muzzle with th e right ,thumban d with th e th um b a nd first finger of th e lefthand, turn the front of the connector counterclcck-wise until it can be snapped onto the connectorlock (2, fig. 17).

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CONNECTOR ASSEMBLY OPERATING ROD

s

OPEt iAT lNG ROD -SPRING GUIDE

OPERZTING RODSPRING

BARRELAND .~._. -RECEIVER

I2

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11. Disassemblyof the Gas System and

a. &a fly&m Using the wrench of the corn-bin&ion tool, loosen a nd r emove the gas cylinderplug. Tilt th e mu zzle down an d rem ove th e gaspiston from t he gas cylinder. Unscrew th e gascylinder lock a nd slide the lock and cylinder for-wardsothetthegaeportisexpowi.

b. Hahrd. Slip th e front band forwa rdtowwd the front sight. Push the han dguardtoward th e front sight an d lift it from th e barr el.12. Assemblyof the Gas System and Hand-

guarda Ha&p&. P&a th e rifle on a flat WI-face, sights up and muzzle to the right. Engage

the ends of the band on the han dguard with thefront (muzzle) end of the slots tha t a re on therear of the barA and at& the han dguard rear -ward. (Do not map or force he handguard intoita insta lled position.) Replace t he front band.

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Q iJl

tFRONT BAND

GAS CYLINDERPLUG

GAS &sT~N

tHAND GUARD

IGAS CYLINDERLOCK GAS CYLII;DER

b. Gas Sya&n. Slide the gas cylinder rsarward&rough the front band. Tighten the gas cylinderlock by hand to its fully sssemblsd position, thenback it off until the loop is alined with the gae cyl-inder. Replace the gas pi&on with the flat parttoward the barrel and the open end toward themuzzle. when the gas piston is properly seated,it will protrude one and one-half inchas below thegas cylinder (fig. IQ). Replace the gas cylinderplug and tighten it securely with the wrench ofthe combination tool.13. Removing the Stabi l izer Assembly of

the M14E2 Ri t l eTo remove the stabilizer asssmbly, u9e themnch end of the combination tool to loosen thel&nut. Then slide the combination tool overthe screw and loown it Swing the yoke awayfrom the bayonet lug, and slide the stabilizer as-sembly off the flssh supprewx (Cg. 20).

14. Replacing the Stabi l izer Assembly ofthe M14E2 Ri ie

To replace the stabilizer 8898m211yslide it overthe Aash supp-r, swing the yoke over the bay-onet lug, and tightan the screw with the combina-14

tion tool (fig. 21). Sl ide the combination toolover the head of the 8crew and place it ovsr thelocknut.15. Disassembly of the Magazine

a. Use a pointed objs& to raise the rear of themagazine base (6g. 22) until the indsntation onthe base is clear of the magazine. Grasp the maga-zinc with either hand, with one finger of the handwwxing the base. Remove the base and guidethe spring, one coil at a time, to clear the retain-ing lips of the magazine.b. Remove and sepwpsrstehe magazine springand follower. Figure 23 shows the parts of themagazine.

16. Assembly of t he MagazineReposition the spring inside the follower withthe rectangular-shaped end of the spring sgainst

the rear of the follower, and replace the followerand spring inside the magazine. Be sure to fullyseat the follower. Replace the magazine base (fig.24).

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. . ..v..-~~5,..-.. , .-. .__ .~ I, .,.STABILIZER ASSEMBLY

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CHAPTER3OPERATIONAND FUNCTIONING

Section 1. OPERATION

17. loading the Magazine (Out o f the R&lu. Place each round on top of the magazine

follower (with th e bullet en d toward th e front ofthe magazine) end apply pressur e with the thu mbto fully eeat th e round in t he ma gazine (fig. 25).b. To load th e magazine, with B I-round car-tr idge clip, the mega .zine filler is use d (f& 26).Slide the filler over the top rear portion of thema gazine and insert L 5-round cart ridge clip intoth e filler. Place either th e th umb or th e open endof the combiiation tool on th e top r oun d an d pushth e 5 rounds into th e ma gazine. Remove t he clipand repeat the process until 20 rounds have beenloaded into th e ma gazine, th en remove the mega-zinc filler.18. loading the Magazine ( in the Ri iAe)

CZ . o load B single roun d into an empty mega-zinc in the weapon, lock the bolt to the rear andengage the safety. Place a round on top of thema gazine follower and pr ess down on the roun dan d fully e& it in th e ma gazine (Cg. 27).

b. A m agazine in th e weapon can he loadedth rough th e top of th e receiver with a K-roundcart ridge clip. To do th ii placa either end of th eclip in the cart ridge guide, then exert pressurewith the thumb or the open end of the combinationtool on the top round, forcing 5 rounda int o th emega zme (fig. 2.8). Remove and diecar d the car -tr idga clip. Repeat t he proceea unt il th e ma ga-zine is loaded.19. loading and Unloading the RiRe

a. Pla ce t he saf&y in th e cafe. position.b. Insert s loaded ma gazine int o th e mn guzine

well, top front first , unt il the opera ting rod springguide enga ges th e ma gazine (1, fig. 29)) then pullbackward and upward unt il the magazine snapsint o posit ion (2, fig. 22). A click will be hear dwhich indicat ee that th e ma gazine is fully eat ed.Pull back an d release th e opera ting rod han dle,allowing th e bolt to str ip the top r oun d from t hema gazine an d load it into th e chamber.

G. Remove th e ma gazine es described in pars-graph 6.

Sect ion I I . FUNCTIONING20. Semiau tomat ic sma ll wme. A knowledge of what ha ppens inside

a. Ea ch t ime B round is fired, th e part s inside th e rifle dur ing th e cycle of opera tion will help youth e rifle work together in B given order. This ia to understa nd the cauaea of, and remedies for,the cycle of open&m. This cycle is similar in all various stoppages.

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b. The cycle of oper&m is broken down in toeight staph These tips we listed below, togeth erwith B brief descript ion of wha t occulg inside th erifle during each step.

(1)

(W

(3)

Fw%ng. Feeding ta kes plsce when around is forced into the path of the bolt.The t op roun d is forced into the path ofth e bolt by th e m&zine follower whichin under pressure of the magazine spring(fig. 30).Chnm het ing. Chamber ing -m-e whena round is moved into the chamber. Thista kes plaoe as th e bolt goes forwar d un derpressu re of th e expending opera ting rodspring, str ipping th e top round from t hema gazine an d driving it f o rward into thecham ber (fig. 31). Cha mbwing is corn -plete when the extractor snaps into theextra cting grcave on th e cart ridge an dt,h e ejector is forced int o the face of t heb-a.L&&g. Locking begins es th e boltroller engages the camming surface in thehum p of th e opera ting rod. It is corn -pleted when the locking lugs of th e boltar e fully seat ed in th e locking recessa ofth e receiver (fig. 32).

(4) Ft inq. Firing occur s when th e firingpin strikes the primer. As th e tr igger ispulled, th e trigger lugs w-e di=ngagedfrom the h-er hooks and the ham meris reIt wed. The ha mm er moves forwar d

under pr essure of the ham mer spring a ndstrikes the tang of the firing pin, drivingthe firing pin against the primer, and fir-ing the round (fig. 33).

(5) u?&&&q. Un lockin g (fig. 34) occur safter t he firing of th e round. As th ebullet is forced th rough th e barr el by th eexpandii gases, L small amount of gasent ers th e hollow gas piston, t he gas cylin-der, and the gas cylinder plug throughthe gas porL The expan ding geeee forceth e gas cylinder piston t o th e rea r. It intu rn drives th e opera ting rod an d boltrearwar d. The operating rod came thebolt r oller upwa rd, disengaging th e lock-ing lugs on th e bolt from th e locking re-ceerses n th e receiver. At th is time th ebolt is un locked.

(6) E x t m e t i n g . Extr acting is pulling theempt y car tr idge from th e cha mber.Slow initial extr action ta kea place as th ebolt unlocks. The bolt in its rea rwar dmotion pulls th e empt y car tr idge with it(fig.36).

(7) Eject ing . Ejecting is rem oving th eempt y cart ridge from the receiver. Assoon es the bolt has withdrawn the emptycart ridge case clear of th e chamber, th eforce of th e ejector spring an d plungerpushes the bottom edge of the cartridgebase sway from the bolt face, throwingit out and sway from the receiver. Whenthe la& round has been fired, the bolt isheld in the rearward position by the boltlC&.

(8) Coc,&q. Cockin g is posit ioning theham mer so that it is ready to fire the nextround. The bolt, as it moves to the rear,forces the hammer down and rides overit. The ham mer is caught by the near ifthe tr igger is held to the rear and by thetr igger lugs if th e tr igger ha s been re-leased (fig. 37). In eith er case, th ehammer is held in the cocked position.

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TOP: STANDARD AMMUN ITION. SEMIAUTOMATIC ANDAUTOMATIC FIRE.

BOTTOM: FOR. FIRING GRENADES

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21. Autom afk (Rii Equips With

o. When thed&r iapositioned with t he fwama rked A to th e rea r (ear type pr ojection up),th e rifle is eat for aut oma tic fire. Turn ing th e CM+l&r to au tomat ic rotat es th e eew release iu posi-tion to make cont sd with the sear .

b. After th e first roun d ha e bean fired (an d withth e tr igger h eld to th e rea r), th e opera ting rodstar ts its rear ward movement under pr essure ofth e expanding gases As it mopes to th e rea r, th ewunector assembly move rearwar d un der pres-sur e of th e conn ector arasm bly spring. The movemeut of th e conu ector assembly rot&e th e eearr&a on th e eel&or sha ft so th at the flan ge on

the sear releaee allows the eaw to move forwadintO a position where it cau engage th e rear H un-me r hooks (1, fig. 38). Then, when the bolt drivesthe hammer to the rear, the sear engages the rearham mer hooks and holds the ham mer iu thecocked position.

c. Afte r th e bolt movee forwa rd end lo&j th eshoulder on the opera ting rod engages th e hookof the connector aswrnbly and forces it forward.This rotat es the sear releaee on the selector sha ft,causing the flauge on the sear release to push themer t o the rear, disengaging it from t he rear ha m-me r hooks (2, fig. 33). The hemmer will then goforwa rd if th e tr igger is held to th e rea r. If thetrigger is released at any time prior to the firingof the leet round, the hammer will be held in thecocked poeition by the trigger lugs.

-SEAR RELEASEROTATED FORWARD

wOPERATJNG RODSTARTED REARWARD

.- @?,A, IN POSIT ION

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_ .&. ,r,*f-74+,>r^.r*.?r,. ..-,. -+ . -.-.vr^.*0SEAR RELEASE

ROTATED REARCARD

ASSEMBLY

--N_/ 01HAMMER RELEASED

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