The KeyMicro Brake is a short, lightweight single port muzzle brake suited for a variety of platforms. Designed for use with our KeyMicro Adapter, it functions as a minimalist brake on its own. Pair them together for the ultimate mounting platform. This is the same technology found in our industry-best KeyMo system. The KeyMicro muzzle devices are also compatible with our KeyMo Adapter. KeyMicro muzzle devices feature a 9mm Bore. SPECIFICATIONS: Pin & Weld - Not Pre-Drilled Material - 4140 HT Alloy Steel Finish - Black Nitride Threads - 1/2-28, 1/2-36, 5/8-24 Weight - 3.41 oz Length - 2.063a ^2 Through Bore - 1/2-28; 9MM / 1/2-3 Mfg: Dead Air Armament