OSS RAD PISTON

Made from 17-4 Stainless Steel, heat treated then Black Nitride finished to for improved wear and corrosion resistance. OSS pistons come with wrench flats that allow for a more secure attachment to your firearm. The RAD piston is interchangeable between SilencerCo and Rugged pistons, as well as between the OSS RAD 9 and RAD 45.