SilencerCo Piston .578 x 28 XL, Stainless Steel - AC1346

The SilencerCo AC1346 is a replacement piston designed for use with SilencerCo suppressors featuring .578 x 28 XL threading, compatible with the Omega and similar models. Built from 17-4 stainless steel and heat-treated for durability, the piston is part of the Nielsen device that enables semi-automatic cycling on unlocked pistol barrels. Female threading allows attachment to SilencerCo threaded barrels, with optional Fixed Barrel Spacer for fixed barrel applications.