, RESTR ICT ED s.c:urity Information TECHNICAL MANUAL FOR RIFLE, U. S., TYPE 99, JAPANESE CAL. .30 ll ESTR ICTfO Security . Informo tion " 1 . ., Contents Genoral Par.t Qte I CCI'letructton and Function ehaptor 1 fW'le I Construct1<m A Barrel Group B Reeel\fer Group C Bolt. .0 MDgo.z1ne ! St.ook Group II Funotion of Breecb Mechanism Chapter 2 kC"lIlIorles Chapter.3 BayOllet and £.c01l880l" lee Chapter 4 Ammunition Chapter 5 Spare Partll Part Two: Haodl1n8 Chapter 1 Disallsetlbly and J.sseably I Nor/ll!l.l D181!U1881:1bly end &.s88mbly II Speoial Dlasas88mbly and .assembly Chapter 2. Precautlon8 in Handling Cblll'ter.3 Pecting 18rt 'fhrelll Preservation Chapter 1 Care I Daily Care II Care Before Firing III Care After Firil'lg rv Carll During Special Instanc8e Chapter 2 ~tore.ge 1 1 • Chspter J InSpeCtiOll 100 meter unIte. Both sidell or the rear deht leat are notched at t ho above­ 1 General Inspection mentioned intervals to engage t he rear sIght slide eate'l when tho upper edge .A. Care of tIle slide c oIncides with t he previoue17 III!IntIoned e tched lines . The circular peop 8Ie:ht formed at the bottou by lOfferIng the rear si ght loaf C Functioo hi used f ar firing at rangeG of 100 mters. The 8olll1circuls.r reap &i ght. D Damage forllOd. by raisinS tbe rear sight loa!' and. slide 18 used far firine raflee::l II Inspection Before and Uter liring of 2CO !tOters. III Inspection of Stared Rifles The farward edge of the rear s i ght leaf SllI' i fig 18 dovetalled and fits Chaptsr I Ritls into Llw rear sl Sht base . It i:J held in place by set SCTen . The rroJec- I Construotion tion on the upper surface prevents tho rOtlr uight leaf frOI'll tlOving to the , Barrel Group right or l eft. Tho spr1.ng I s curved upMrd so t hat it COnstant ly exerts 1 Tho Inside of the barrel is dIvided into .. rifled s.otloo. challber, upward prOSSlU'8 on the 10'Pl8r ond of the rear r i ght baf. • bolt face seat. The lI ild. 111 ins erted 001.0 the reer sight Ie",f and is held in t he The rifled eeetion conai st8 or tour 1'ight twiet ritllnlS ... boae land deaired position by Mana ot a s;:,ring loaded catch. The 1'e8r sl£ht set eurface ia CbrOll'oII plated. The chaar i a shape,d to tit th. cartridle 8cru on the upper rigbt s ide preV8nts t.., elide !'roJ! s U pping ofC . Ths and its rear partion ls rounded to farlll a bolt tao. ee .. t. IIprln£ leeded elide catch h acrewed on e.ech aide of t he e Ud" by a s l N " The bolt £ace lJ8at aide in guiding the eQlullition and baa an extractor pin . The center peep s i ght is a liened ... !th the front s ight t or tiring rllnges groove on the r4!:ht aide. Tb8 outside aurface or tbe rear ent!. of bolt talle of JOO to 1500 IIIOteu . The catch of the s lid8 thl'OIlf!h tho aotion of th8 seat is threaded . mer the receiver i s screwed 00 to tbe barrel, it 1e apri ng enlag8e t he UOOVOS OIl bot h s i des of the rear s i gbt laaf IiIDd bolds aligned dth the ltarker. the slide in its 'VarioUS elewted poslt1or.e. Q, each s ide and at the back 2 The barrel att aclmante coneiet of rear eieht and rear eight baae, front of the elide :Is an antiaircraft leed Bieht arlll. The anti.alroratt load sight and fr ont al lht base . 8ight arBl has two scaled notche8, 2 and J . at the bottOIll. Notch 2 fa ~ed The rear Bight ba8e is IIlOUTlted on tbe rear of the barrel and 1a pre- 3 far firing on a ircr aft traveltng direct IlOr izontal diste.nces tor 600 yard a vonted from moving by e s trali rear sigbt Osee sore" and a 8Nli rear sight at sneads of 125 lII.1ldS per hoW' and Notch 3, at Hf'6edS of 185 m.1ltls per tipx'ing ecrew. hour . The antiaircraft lead s i ght 801'111 i tl attached by antiaircraft IMd The rear s ight leal' is pivoted by a rear silbt Jolnt pill and lIILintaine U~I scr81'18 . The Bj'r lng attached to the botton holda the antiaircrart a1'1II 10'llored and r aised positions through rear ailbt sprinl IICtion. The rear in foldeJ and extend ed positlor,s. v.:aine its oporat.ion t lle a1rcl,.. ft is sight I eat' is graduatJtll from JOO to 1500 utere by etobed lines _paced into sllaned dth tlu:~ f ont and "eN' s ight ana fjr8\! upvn when it 8nUlr n the 2 3 I proper notch on tl'.e bottol!) of the antilti.rcraft lead elj;ht &rill. uoove 1B wWened to house t be boH lOC l'J.llg lug. en the tor llUrf ace of thIs The tront slg!'lt blade is dOTIltallod tightly ir,to t he tront sieht bass. housing 18 a gae par.t which permits g88 t o osotlpe. An ongraved Crtlst i s The l'rout slght be.!le i s a t.tached t o the forward end or the barrel and held lOCAted in the for1l'!l.rd portion of the gas port, and an engraved figure in pOI'l1tlon by the l'ront sight base pin which 18 inserted hOrl 10ft to right. "Type 99" , reading ~O lil l eft to right, is l ocated t o the NIM' or t~e gila The lJne fC'l'Did wlth the !'ront sight base ud the tront sight is determined port. The f'r ont end of the inside groove 111 alao ... !dened to provide passage by ~ro-in8 . Two £hould6Ts which project upward frO.f!l the front S18ht ba.St'l for tha bolt retaining lug. At the Teal' of t he Tecsiver ther e is a groove tlerve S!l CUfU'da tor t he si6bt blade. tor the t ue on the setety knob and anot.herpoove for the s&ar catch. .1 UOO~. B Heceiver Cr oup Oil whioh the safety catch lug rides 18 locat.ed 111 the sxtended pOl"tion of The receiver houses the bolt. The upper aurf a.ce or t he receivOt' bea the receiver , Thh g.. oove curves to the left. wld n r 'S8 &8 8 eulde and lock tf;O BO\l8611 holes . The one r.hlch Is c ut out !'rom the top t o the right eid8 fur t he safety cstch lug when the rUle is eet 1,ri safety posltioll . S8rV68 (W 8 reCelV6l' port during loe.dtnB eoo as ell ejection port afteT tiring. 6 Receiver attachlr.ents consist of. bolt lat.ch, ejector, slar, triseer, The cnTtridf,(o clip housinG i s forlllSd by t he rear Bect.ion . Tha othar hole and reooll pl ate. sel'YS S as a path for t he bol t handlo . It 16 slanted tonrdo the tront on" 7 The bolt retainiJIg latch esselllbl] fits on the left reM' elde of the to facilitats the acti on of tl:tl bolt when it is !lulled back. receiver. The sear catch always rroJects out through the action ot bolt re­ T'nere Is 8 Ions 11I.rrow reces!! along each Bid e of the rece!ver in which taining lat.ch Spr1n8 attached to t he bolt retainer . It engages t.he bolt the bolt rides . Serial r.mr.ber or the rifle and t he nellIS ot the manutactUl'­ retatning lug and lbdte the bacDiard II'oOVtllIlI!mt of t he bolt. In order to ine fLT _ are 8n81'avOO below the groove on the lett aids. .1 alot. wbich engagal rlllOye the bolt frOIl the receiver, the bolt retaining lat.oh 11.1 pulled out to the bolt retainer Mes, and lip of ball ntainor, and an eJeotor groove are dbengase the catch. The ejector is attached to t.he bolt retalntne latch four.d on t.he rlar lett s ide. Maeroly by the latch scre" aNt projocts into the eJector eroovo or the The sear rin seat is loeated to the rear of the rectaneular opening at receiver by th\! act.ion of ejector spring st.lached t.o t. he bolt. reta11ling latch tho bottom. Tho safety lock hole i8 locat.ed on the forurd aection of the Bpt' i(18. sear r in seat ar.d f!rinE pin caLeh hole in t he rear leclion. The fonard Then tho bol t 15 brought t o t !!e reu I the Ijector riding 011 t he ejector ancl rear receiver 1ll8s are drilled f or lor.g and short receiver screws. The eroove st.rikes the botto. of t he certr1ilge end throu tloe certrldee out to ~ cr a \ll S are us8ll to attach the trigger guard to the receivfll'. The butfer aoo. the riGht. The cetch of the bolt. retaining latch elves proper pooillon to recoil pIate aro attached to torward and rear l ugs, respectively, til'ld serve the ejoctor "'hen the boll is 1'8l:!Oved . t o lrc.nsm1t rscoil IIhock to the stock duri ng ftring. 6 The sear haa s tiring pin catoh on the rear end and a M rety lock 011 en each side of the inner surface ia a long1t.ud1nBl groove which per­ the !'ront end, and is at lB.ched t.o the seer pin seat or t ha receiver by l".8ans tdts the rldlng of bolt looking l ug and ext.ract or.