TAPCO Diamond 1/2 x 28 Micro Brake - Black - The TAPCO Micro Diamond Brake easily threads onto the end of any (1/2 x 28) 9mm barrel. Designed to be an easy add-on to any threaded pistol, still making it concealable and increasing muzzle control and reduce recoil. Diamond Black Nitride Finish 1/2 x 28 Threaded Pitch
