I'm thinking of pinning a 3" linear comp made of 7075. I'd like to cut the barrel down to 13-1/4". Would drill and pinning a rod with high-temp epoxy be alright? Or putting a steel pin with about 1/32" below the surface and Tig over? I have access to aircraft grade high temp epoxy used in the jet engine area. If it was placed on the threads and cured you would year the barrel out of the receiver if you tried torquing it and it's good to 800 deg F. Any advice?