SilencerCo AC1756 Osprey/Octane Piston 1/2x28 9mm Stainless Steel

The SilencerCo AC1756 is a replacement piston (Nielsen device) designed for SilencerCo's Osprey and Octane suppressors. The piston replaces a fixed barrel shoulder so the suppressor can cycle on tilting-barrel pistols without the slide battering the unit, and pistons are user-swappable to configure a single suppressor for a wide variety of host firearms.

This AC1756 features a 1/2"x28 thread pattern and is tuned for 9mm subcompact pistols with a soft shoulder cut, including the Glock 43, Smith & Wesson M&P Shield, and SIG P938. It is built from 17-4 stainless steel and heat-treated for maximum durability under repeated firing.

Finished in stainless, the AC1756 is sold as a single replacement or add-on piston so you can match your suppressor to whatever host you plan to run that day.