Fortis Manufacturing, Inc. RED Muzzle Brake, 5.56MM, Nitride Coated, Black Finish F-RED Fortis' Rapid Engagement Device" or better known as the Fortis RED(TM)" is a brake that stays true to Fortis' brand. They wanted to develop" engineer" and design a military grade accessory that not only functions great" but looks great also. Tested and evaluated by people in the military and law enforcement community - then put to the test by members of the 3 gun community" Fortis came up with this design. Tested under harsh full auto conditions" the RED(TM) doesn't disappoint. Now control shield compatible! Keep your speed and accuracy up. Put more down range and on target. Try out the Fortis RED(TM)