The 30CB Compact Brake (CB) Muzzle Brake is a unique Thread-Over Muzzle Brake also referred to as a TOMB style brake. It features a conical design towards the rear of the brake to increase the seal between the muzzle brake and the suppressor. An added benefit of using the 30CB CB Muzzle Brake is that there are far less threads that make it easier to install or remove the suppressor. The beauty of this muzzle brake is that it is extremely effective when not used with a suppressor. You will notice a dramatic decrease in felt recoil, which will allow you to stay on target easier.