The SilencerCo AC626 Piston is a high-durability, multi-caliber solution crafted from 17-4 stainless steel and heat-treated for maximum performance, designed to quickly swap for different host firearms or calibers while maintaining reliable semi-automatic cycling through the Nielsen device. This stainless, stainless-finish piston features female threading that attaches to SilencerCo threaded barrels, enabling seamless integration with your compatible SilencerCo suppressors, and the optional Fixed Barrel Spacer allows for fixed barrel applications when needed. Built to handle demanding use, the AC626 Piston employs a 13.5x1 LHM XL thread pattern to ensure a secure, precise fit with compatible platforms and is described as a multi-caliber piston that can adapt across configurations without sacrificing reliability. Its robust construction and interchangeability make it an ideal choice for shooters seeking a single, adaptable component to cover multiple hosts and calibers, reducing parts proliferation and downtime during field setups. Compatible platforms include the Omega K Series, Hybrid 46, Hybrid 46M with Charlie Piston Mount, Osprey, Octane, and Omega 36M with Charlie Piston Mount, providing broad versatility for hunters and range enthusiasts who value modularity, durability, and consistent cycling performance in their suppressor system.