Where this clamp sits, there is a spigot. Since the rifle came sans muzzle break, I wanted a thread protector to cover both the thread and the machined spigot area to protect the thread whilst I am not using a suppressor. Accuracy International Threaded Barrel I contacted David atShooting Sh...
These adapters feature a raised surface that interacts with the muzzle face of the barrel rather than the front sight base, permitting vastly superior theoretical alignment accuracy than the detented and loose, rattle-trap devices common to these systems. For rifles that have clean muzzle faces ...
We use these in our gunsmith shop all the time when the barrel's O.D isn't enough for the suppressor's thread. As long as you thread the muzzle correctly these adapters will be true every time. Or if you just need to take 1/2-28 to 5/8-24. They are the best on the market!