Shop › FORTIS MUZZLE BRAKE 556 BLK FORTIS MUZZLE BRAKE 556 BLK $66.45 Fortis Manufacturing, Inc. Muzzle Brake, 5.56MM, Black Finish, Fortis Control Compatible 556-MB-BLK Quantity: Add To Cart Added! Fortis Manufacturing, Inc. Muzzle Brake, 5.56MM, Black Finish, Fortis Control Compatible 556-MB-BLK