SilencerCo AC28 Osprey/Octane Piston M16x1 LH, Black Stainless Steel - AC28

This is a suppressor piston designed for SilencerCo Osprey and Octane silencers chambered in 45 ACP with M16x1 left-hand threading. Constructed from 17-4 stainless steel and heat-treated for durability, the piston is part of the Nielsen device that allows semi-automatic cycling while containing female threads for muzzle attachment. Pistons are easily interchangeable for different host weapons and calibers, compatible with threaded barrels on firearms like the HK USP-T and HK45T.