A block of wood placed under front of auto gun receiver will aid in installation of barrel support assembly.
1. INSTALL BARREL SUPPORT ASSEMBLY.
a. Place wooden block under front of auto gun receiver (1).
b. Install barrel support assembly (2) over breech lug (3). Slide breech lug (3) out of slot in breech sleeve (4).
c. Push flange on barrel support assembly (2) against receiver flange (5).
2. INSTALL CAPSCREWS.
a. Install nine capscrews (6) through flange of barrel support assembly (2) and into receiver flange (5). Tighten capscrews finger-tight.
b. Torque seven capscrews (6) to 160 in.-lb ± 10 in.-lb (18.08 N-m ± 1.13 N-m). The two capscrews next to receiver flange (5) cannot be torqued due to lack of clearance for torque wrench. Tighten these capscrews with 6-mm hex key.
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