The new trigger pin for the receiver assembly is illustrated in this procedure. The old trigger pin is also illustrated here. When old trigger pin is unserviceable, replace with new old style trigger pin.
5. Install compression helical spring (15) into the back of the firing pin receiver.
To avoid injury to your eyes, use care when removing and installing spring-loaded parts.
6. Install new trigger pin as follows:
A fabricated slave pin (item E-2, app E) may be used to hold items (16), (17), and (18) together.
a. Place compression helical spring (16) on trigger (17).
b. Position sear (18) on compression helical spring (16) and align trigger pin holes in trigger (17) and sear
c. Install the trigger (17) and secure with trigger pin (19) and spring pin (20). Check that head of trigger pin (19) is located on right side of receiver.
7. Install old trigger pin as follows:
a. Place compression helical spring (16) and sear (18) on trigger (17).
b. Install trigger (17) and secure with trigger pin (19) and sleeve bushing (21).
8. For firing pin protrusion test procedures, refer to page 3-35.
ARMY TM 9-1010-221-23&P AIR FORCE TO 11W3-9-4-2 MARINE CORPS TM 07700A-23&P/2 NAVY SW 370-AE-MMI-010
3-10. RECEIVER ASSEMBLY-MAINTENANCE INSTRUCTIONS (CONT).
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