SilencerCo AC29 Osprey/Octane Piston 45 ACP M16x1 RH Black Stainless Steel

The SilencerCo AC29 is a dedicated 45 ACP caliber piston designed for use with the SilencerCo Osprey and Octane suppressors. Machined from 17-4 stainless steel and finished in a low-glare black, this piston lets the end user reconfigure a single Osprey or Octane suppressor to host pistols chambered in .45 ACP.

The thread pattern is M16x1 right-hand, matching the host barrel's muzzle threads on supported .45 ACP handguns. By swapping pistons, shooters can share one suppressor across host firearms in different calibers without sending the unit back to the manufacturer. The 17-4 stainless construction holds up to repeated installation and the heat and pressure of suppressive use, while the black finish blends cleanly with the Osprey and Octane body for a unified look on the host pistol.

Each AC29 piston is a genuine SilencerCo part (MPN AC29) intended as a caliber-swap accessory for owners of the Osprey or Octane line of suppressors.