Shop › FORTIS RED NITRIDE MUZZLE BRAKE 556 FORTIS RED NITRIDE MUZZLE BRAKE 556 $75.00 Fortis Manufacturing, Inc. RED Muzzle Brake, 5.56MM, Nitride Coated, Black Finish F-RED Quantity: Add To Cart Added! Fortis Manufacturing, Inc. RED Muzzle Brake, 5.56MM, Nitride Coated, Black Finish F-RED