The SilencerCo AC29 Osprey/Octane Piston 16M x 1RH 45 ACP Black Stainless Steel from SilencerCo is a purpose-built, easily adjustable component designed to adapt pistols for multiple hosts and calibers, delivering reliable semi-automatic cycling by integrating with the Nielsen device to unlock pistol barrels. Crafted from 17-4 stainless steel and heat-treated for maximum durability, this piston offers a robust, long-lasting solution that can be swapped to suit different platforms, and when used with a Fixed Barrel Spacer, accommodates fixed-barrel applications while maintaining secure, precise alignment with SilencerCo threaded barrels. The pistons female threading ensures a snug attachment to compatible SilencerCo barrels, simplifying maintenance and swap-out efficiency in the field or on the range. Built for versatility, it is compatible with a wide range of SilencerCo suppressor families, including Omega K Series, Hybrid 46, Hybrid 46M with Charlie Piston Mount, Osprey Series, Octane Series, and Omega 36M with Charlie Piston Mount, making it an ideal upgrade for shooters who demand quick-change options without sacrificing reliability. Finishing in black with a stainless steel construction, this 45 ACP piston is designed to deliver consistent performance in demanding shooting environments.