There is nothing like owning and purchasing Ruger Factory parts and accessories for your Ruger firearms. This particular part is a muzzle device made specifically for any rifle chambered in .22 caliber cartridges. The Radial port muzzle device does not require timing and as such does not use a crush washer or a jam nut. It is made from alloy steel and features a matte black finish. It is worth noting that the part is made right here in the USA.