The KeyMount Muzzle Brake 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 KeyMo 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. MPN DA102 UPC 810042000000 COLOR/FINISH BLACK SAFETY NO THREAD PITCH 5/2X24