M16 Maintenance Manual TM9-1005-319-23.pdf - CombatRifle.net

ARMY TM 9-1005-319-23&P
AIR FORCE TO 11W3-5-5-42
8. Engage threads of barrel nut assembly (9) with upper receiver assembly (8).
9. Using combination wrench (10) and torque wrench, torque barrel nut assembly (9) to 30 ft-lb (40.5 N-m).
Torque is measured when both wrenches are used together.
NOTE
Three times torquing procedure provides for a better thread fit and prevents barrel nuts from becoming loose.
Do not use the torque wrench for loosening.
10. Make certain all three drive pins on combination wrench are engaged with barrel nut assembly (91 Loosen and
repeat torque operation. Then loosen the barrel nut again.
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