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Sample text

The breech block h~s started on reco:I caerying v:ith it :he fired cartridge. Figure H. rnctcd the striker pin i rom the fired c~rtridge. ~ocate rearward. The hammer BREECH BLOCK The breech block is connected to the breech bolt by tho same e»tter th~t connects the breech bolt to the breech b;,rs. See Figure 43. The purpose of the breech bolt is to enend

Terlock c::>rti•r :s ca~ried with it be<::>use it is ""gaged in the catch l'eCO$l in tht! ejector, Figure 42. vard movemeot of the magazine interlock rod frees it from the magazine interlock fork, Figure 42. ock rork and th\! tri~er p~w! triilpin~ OOit then return to their ori~nn1 posiOOns. L2. bec3usc of :he pre~~un: of the t:i~e: pawl trippin;: bolt spring. Figure 36. r p<1wl, Fi;ure 42. ' crank because o! the prenure of lhc ccnr:. prcncd &pring ~tween the tri,s:cr '),'\WI holder and tri~~cr pilwl.

L:~·:- pon t:-Ott'. the = Figure ~5-Breech bolt hns orricd ortrid~e into posmon to be fired. Rear hamn1er toe on hnmmer plate; front h3mmer tots in recess in breech c:lSlng PAGE 58 CHAPTER 5 RECOILING PARTS AND BUFFERS fired cartridge. The hammer plnte cam surfaces are arranged so that the front toes are clear when the re~r toe is operating, and the rcverst is also true. The three conditions of the operation of the striker gear are: 1. Breech block is traveling forward: Figure 44, it has picked up a cartridge.

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20 mm. A.A. Gun

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