Technical data

TM 9-1005-319-23&P 0015
0015-24
TEST AND INSPECTION - Continued
1 v s 1 3 1
1 4
3 1
Figure 33. Use of Bore Straightness Gage.
NOTE
Ensure barrel is clean prior to performing the following test.
3. Check straightness of bore using straightness gage PN 8448202 (31). Put gage in barrel. Tilt barrel
and allow gage to fall through. Catch gage.
4. Gage must pass freely through barrel. If gage does not pass through barrel, recheck as follows. Hold
upper receiver and barrel assembly (14) in vertical position with muzzle pointed down; insert gage into
chamber end of barrel. Release gage and catch it as it exits muzzle end. If gage passes freely through
the barrel, barrel is acceptable. If it does not, the barrel must be straightened or replaced. See WP
0016.