SilencerCo AC25 Osprey/Octane Piston 9mm 1/2"-28 Stainless Steel

The SilencerCo AC25 is a replacement 9mm piston designed for the SilencerCo Osprey and Octane suppressor platforms. Machined from 17-4 stainless steel, this piston is the factory-spec component used to configure the Osprey or Octane for host handguns with a specific thread pitch.

This AC25 piston features a 1/2"-28 thread pattern, matching the barrel thread found on 9mm Luger handguns. The stainless steel construction resists corrosion and delivers long service life, making it a reliable choice whether you are replacing a worn unit or reconfiguring your suppressor for a new host. The AC25 is purpose-built for the SilencerCo Osprey and Octane family of suppressors.