Technical data

TM 9-1005-319-23&P 0021
0021-21
23. Reassemble weapon; refer to TM 9-1005-319-10.
END OF TASK
TEST AND INSPECTION
1 v s 2 2 0
Figure 29. Use of Thickness Gage.
1. With the upper receiver attached to the lower receiver, and the pivot pin and takedown pins in place,
perform the following test:
a. Apply hand pressure to push the upper receiver as far to one side as possible.
b. Attempt to insert a 0.020 in. thickness gage between the pivot pin lugs of the upper and lower
receivers.
c. If the thickness gage penetrates to the pivot pin at all accessible locations, repair by replacement of
the upper receiver or replacement of weapon is required.
2. If weapon fails the above test, remove the upper receiver and install a "NEW" upper receiver and
perform the test again.
3. If weapon now passes the above test, it shall be considered serviceable and continue in use.
4. If weapon fails the test with a new upper receiver, this failure shall be considered a shortcoming. This
shortcoming requires action to obtain a replacement weapon. Once a replacement has been received,
evacuate the original weapon to depot for overhaul.