HUXWRX RAD Piston Barrel Adapter 1/2x28 Black. Our pistons come with wrench flats that allow for a more secure attachment to your firearm. Features -Interchangeable with SilencerCo and Rugged pistons -Interchangeable between RAD 9 & 45 -Pair with a Piston Spring for reciprocating barrels or Fixed Barrel Spacer for fixed barrels. -Wrench flats In an attempt to minimize waste some suppressors and muzzle devices may arrive in OSS packaging while we transition to the new HUXWRX packaging. All suppressors purchased after 1/1/2022 will be engraved with HUXWRX. Specifications for HUXWRX RAD Piston Barrel Adapter: Manufacturer: HUXWRX Color: Black Fabric/Material: 17-4 Stainless Steel Package Contents: HUXWRX RAD Piston Barrel Adapter HUXWRX 1792: RAD Piston Barrel Adapter 1/2x28 Black