Barrel threading is done at Under Ground Gun Works for the purpose of attaching a flash hider, compensator, noise suppression, and other special purpose devices on the muzzle end of the barrel.

The process of barrel threading usually starts with the barrel being removed from the firearm (some rifle barrels can/have to be left attached).

The barrel is turned down (metal removed) using a lathe to the proper dimension.

Threads are then cut into the barrel to the desired thread size that the attachment requires.