Tapco Diamond Micro Muzzle Brake Black. Designed to be an easy add-on to any threaded pistol still making it concealable and increasing muzzle control and reduce recoil. Specifications for Tapco Diamond Micro Muzzle Brake: Manufacturer: Tapco Color: Black Caliber: 9mm Luger Finish: Nitride Threads per Inch: 1/2x28 Length: 3.9 in Tapco TAP22005 Diamond Micro Brake Black Nitride 1/2"x28 Threads 9mm Tapco TAP22005: Diamond Micro Muzzle Brake Black