Dead Air Armament KeyMicro, Flash Hider, 9MM, 13.5x1mm LH, Nitride Finish, Black DA117 The KeyMicro Flash Hider is a short" lightweight flash hider suited for a variety of platforms. Designed for use with Their KeyMicro Adapter" it functions as a minimalist flash hider on its own. Pair them together for the ultimate mounting platform. This is the same technology found in their industry-best KeyMo system.