The Dead Air Keymount Muzzle Brake, 1/2A-28 is your gateway to silence. When you're ready for peace and quiet use the Keymount brake to quickly attach your Sandman-L(TM), Sandman-S(TM), Sandman-K(TM), or Key-Mo equipped Nomad-30 to your rifle. If you're not quite ready to turn up the silence, you can still employ the finest brake on the market and experience a flatter shooting rifle with minimal concussion compared to traditional muzzle brakes.