TM 9-280 1944 Caliber .22 Rifles, All Types - US Army Combined ...

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DESCRIPTION AND FUNCTIONING STOP, EJECTOR - 88558 RECEIVER N \ SIGHT, FRONT. A130025 BARREL - D1816 TM 9-280 11 SPRING, RETAINING. MAGAZINE - D28315 TRIGGER - C64032 RA PD 81958 Figure 33 - Barrel and Receiver Group of U.S. Rifle, Cal. .22, M2 BARREL- D1816 SIGHT, FRONT - A130025 SPIN, FRONT _iJSIGHT - Al 30005 STUD,a MOVABLE I8128427 STUD, FIXED RA PD 22715 Figure 34 - Front Sight Group of U.S. Rifle, Cal. .22, M2 facture. On the upper left hand side, directly in front of the tenon threads is stamped "Long rifle Cart'ge only." (2) The fixed stud, to which is assembled the front sight group, is prevented frm moving laterally by a slot which bears on a lug on the upper side of the barrel. The fixed stud pin enters a hole in the fixed stud and a slight recess on the top of the barrel, preventing longitudinal displacement of the stud. 35
TM 9-280 11 CALIBER .22 RIFLES, ALL TYPES STOP, EJECTOR SEAR B8558 B128416 * RA PD 22714 Figure 35 - Receiver Section of U.S. Rifle, Cal. .22, M2 - Bolt Removed - Top View c. Front Sight Group. The moveable stud of the front sight group (fig. 34) fits into the undercut slot in the fixed stud. The front sight fits in a slot in the moveable stud and is held in place with a tapered pin both ends of which are upset to prevent accidental removal. The rear face of both the fixed stud and the moveable stud are serrated on the back to prevent any reflection of light from the surface interfering with the aiming of the rifle. d. Receiver. The receiver (fig. 35) is machined to receive the bolt and is open at the forward portion for the ejection of cartridge cases. The rear portion is bridged; the front surface of the bridge forming a locking shoulder and cam for the locking lug on the bolt handle (par. 8 c). Two tapped holes in the bridge of the receiver serve as a mounting for the rear sight assembly. A cam on the rear inside of the bridge of the receiver acts to start the initial backward and final forward movement of the bolt (par. 13). A rectangular groove extends the full length of the receiver on the left side. This groove serves as a guideway for the ejector lugs, and prevents rotation of the bolt head. An extension to the rear of the receiver is tapped for the rear guard screw. The front end of the receiver, which seats in the stock, is tapped for the front guard screw. An oblong hole is provided in the bottom of the receiver for the magazine. Another slot is provided for the sear. The ejector stop is mounted in a slot in the left back of the receiver. e. Trigger Mechanism Group. The trigger mechanism (fig. 36) includes the sear, sear pin, trigger, and trigger pin. The sear is pivcted on a pin between the lugs on the receiver and the trigger pivots in a slot in the sear. The sear spring is seated in a seat in the foc;-ard end of the sear and bears against the receiver bottom. The 36
Page 1 and 2: K 1003.16 WAR DEPARTMENT TECHNICAL
Page 3 and 4: WAR DEPARTMENT Washington 25, D. C.
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TM 9-280 1944 Caliber .22 Rifles, All Types - US Army Combined ...

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