REM/AAC package gun. Very happy with this setup so far. Glad I picked it up.

I cleaned the threads in the can and on the mount so I guess I will see what happens next time out.

The upper was built by Allen Brown at High Caliber Sales. I have had the upper and 12th for about a year and a half now with no issues before.

I have a 12th model I use on my Mod 0. It will always loosen up on me after a half dozen or so shots. It does not matter how tight I put it on it will loosen up on me. Any tricks to get it to stay tight?

A pic of the Mod 0