Now you can mount any 1/2-28 TPI end-of-barrel accessory on your rifle's non-threaded 1/2 barrel-including muzzle brakes, flash suppressors, compensators, sound suppressors, or fake flash hiders and suppressors-with this high-quality barrel thread adapter. This barrel thread adapter easily attaches to the factory-finished plain muzzle using two set screws. Thread Adapter Features and Benefits