The Gray Ops Competition Muzzle Brake, designed and manufactured by Kinetic Security Solutions. Engineered port geometry delivers class leading recoil reduction with less concussion at the shooter, keeping you on target without the headache. FeaturesOptimized port geometry - Reduces recoil and muzzle rise for consistent follow-up shots. Less concussion to the shooter.Common thread pitch options - Standard 5/8x24 and 3/4x24 threadsOversized Jam Nut - Allows for easier installation with a variety of tool sizesDurable finish - Black Nitride