The only things I can suggest:
-True the face of the upper
- Apply grease to face of barrel extension and inside nut as well as threads.
- You could try a brass round head screw in a drill and lapping compound on the muzzle. If you are going to get it lathe crowned anyway, it would not hurt to try first. People have reported it works.
-True the face of the upper
- Apply grease to face of barrel extension and inside nut as well as threads.
- You could try a brass round head screw in a drill and lapping compound on the muzzle. If you are going to get it lathe crowned anyway, it would not hurt to try first. People have reported it works.