APEX GRADE THREAD PROTECTOR Apex Tactical’s Grade Thread Protector prevents unwanted and costly damage to your barrel’s muzzle threads when a compensator or sound suppressor is not installed. Also gives your pistol a neat, finished look when the muzzle device is absent. Included with the Apex Tactical Grade Thread Protector is a rubber O-ring that provides an extra layer of protection for the muzzle crown while keeping the thread protector from working loose. Features: Fits any ½"-28 threads Stainless steel, natural finish, matches Apex barrels Same protector that comes with Apex Grade threaded barrels Use on other brand barrels as well 1 Thread Protector per package The Apex Tactical Grade Thread Protector’s knurled exterior gives you a firm grasping surface for easily tightening or loosening the protector on your barrel.