USED Anarchy Outdoors Full Port Muzzle Brake .30 cal 1/2x28 Matte Silver. The spiral port outlets along with the parabolic internal taper significantly reduces recoil while not making it overly loud. It is a must have for any RAR or lightweight mountain gun. It matches the factory RAR barrel perfectly. Specifications for Anarchy Outdoors Full Port Titanium Muzzle Brake: Manufacturer: Anarchy Outdoors Fabric/Material: Titanium Length: 2 in Width: 0.75 in Height: 0.75 in Gun Type: Rifle Package Contents: Anarchy Outdoors Full Port Titanium Muzzle Brake Anarchy Outdoors 791617486409: Full Port Muzzle Brake .30 cal 1/2x28 Matte Silver