Technical data

TM 9-1005-319-23&P 0015
0015-9
A C C E P T A B L E
N O T A C C E P T A B L E
1 v s 1 1 3
Figure 13. Bore Inspection.
5. Inspect bore for burrs, cracks, rust, bulges, and pits using the following guidelines.
a. Pits no wider than a land or groove and no longer than 3/8 in. (0.95 cm) are allowed in the bore.
b. Uniformly fine pits in a densely pitted area of the bore are allowable.
c. Lands that appear dark blue due to coating of gliding metal from projectiles are allowable.
d. Definitely ringed bores or bores ringed sufficiently to bulge the outside surface of the barrel are
cause for rejection. Replace barrel assembly if defective.
1 v s 1 1 4
1 6
2 5
1 0
Figure 14. Alignment of Compensator.
6. Hand check compensator (16) for looseness on barrel. Align the third (middle) slot (25) straight up at
top dead center (TDC) in line with front sight assembly (10). The alignment may vary as much as one
half the width of slot in either direction. If loose or out of alignment, repair.
7. If upper receiver is separated from barrel assembly, inspect chamber for pits utilizing a flashlight. Pits
1/8 in. (0.32 cm) in length are cause for rejection. Replace barrel assembly if defective.