Loctite will probably work, if it is not a *mission critical* piece what the hell, put a buck in a jar everytime you shoot it till it blows out (if it ever does) and then empty the jar and get a new one, and some other goodies!
A lot of shops get lazy and drill the hole rather than ream it, it is a number 15 I think that works, but not as good as reaming.
... oh, and welcome to the bigbore and Gunzilla show, don't forget to visit the gift shop on your way out!