SilencerCo AC25 Osprey/Octane Piston .5×28 9mm 1/2″-28 tpi Stainless Steel

This piston by Silencer Co. is made out of 17-4 stainless steel, and is used for 9mm caliber handguns. Made for the Osprey and the Octane, this piston features a 1/2″x28 thread pattern.