Figure Bolt and firing pin

i. Check to assure that only full round bolts 7160092 are used in the carbines M2 and M3 (Fig. 58). Bolt 557148 will be used in carbines Ml and M1A1 in so far as practicable in order to conserve supply of bolt 7160092 for use in the carbines M2 and M3.

j. Visually inspect to assure sufficient firing pin protrusion and proper contour of firing pin point. (The firing pin protrusion should not be less than 0.048 inch DEPOT MAINTENANCE ONLY.)

k. Check assembled bolt to insure that, extractor shank does not protrude beyond body of bolt.

L Repair and rebuild of the bolt group consists of replacing worn or damaged parts. Bolt faces and other parts subjected to burned powder residues must be thoroughly cleaned. Scrub these parts with a bristle brush moistened with rifle-bore cleaner.


a. Insert ejector and ejector spring so that recess in ejector, when it is depressed, will line up with inside surface of the bolt to permit complete entry of the extractor.

b. Insert extractor spring and plunger. Position the plunger so that its flat surface will match the inner flat surface of the extractor retaining lip.

c. Place bolt disassembling tool 7313298 on bolt (Fig. 60) so that slotted tang of its pawl rests on extractor plunger. (The bolt disassembling tool 7313298 is supplied to organization personnel and ordnance field and depot maintenance personnel.) Turn thumbscrew of tool until plunger is depressed; at the same time, the ejector is depressed into bolt by the tool.

d. Insert firing pin and extractor and remove tool.


a. Test bolt for freedom of movement in its guideways in receiver. Check freedom of movement of firing pin in bolt, fit of tang in slot, and protrusion of nose of pin from face of bolt when in forward position. Firing pin should move freely in bolt.

b. Check functioning of extractor and ejector. Ejector should return forcibly from depressed position. When ejector is depressed, it should not extend beyond front lip of bolt because it is likely to cause interference with feeding.



a. Do not remove front sight unless necessary, as the body of the front sight is crimped over both ends of the front sight pin, and front sight key is staked at the rear end in its keyway in the barrel. When original finish is reasonably satisfactory, the removal of front and rear sights and front band to permit sand blasting, in order to obtain the highest quality protective finish, is not required.

b. Remove the front sight as follows:

(1) With the barrel and receiver in a padded vise, the muzzle protruding about 1 inch beyond the jaws of the vise, and the front sight vertical, drive out front sight pin from left to right, using a 3/32-inch drift.

(2) Position front sight removing tool 7161237 over front sight, hooking it on the rear of the sight (Fig. 63).




RAPD 130525

Figure 62. Firing pin 6200976.

(3) Enter pilot of tool screw into end of barrel and remove front sight by turning handle of tool.

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  • Eija-Riitt
    How to remove firiing pin m1 carbine?
    4 months ago

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