Quote Originally Posted by jsbhike View Post
I think the biggest thing is avoiding greases that use graphite due to the possibility of galvanic reactions from aluminum and graphite(and recall reading a Navy memo that graphite and steel can have issues too).
This is the reason moly grease is specified.

A little on the threads and make sure the front of the barrel extension has some grease all the way around where the barrel nut has to rotate against it.

Torque well above minimum and then loosen several times, then torque to minimum and tighten to the first notch.