SilencerCo Piston 1/2×28-SN, Stainless (9mm)

This SilencerCo AC1756 piston is a service and compatibility part for SilencerCo Osprey and Octane series suppressors. It provides the female threading and indexing interface required to attach the suppressor to a threaded pistol muzzle. Constructed in a stainless steel finish, the piston is intended for use on small-profile pistol barrels where the piston must index on the muzzle rather than on a shoulder.

Key Specifications

• The thread pattern is 1/2×28.
• The model designation is Piston (AC1756).
• The material is listed as stainless steel.
• The finish is stainless.
• Designed to fit Osprey and Octane suppressor families.
• The listed caliber/gauge compatibility is 9mm.
• The product is identified as a piston type component for the Nielsen device.
• Additional fitment notes list compatibility with Glock 43, M&P Shield, and Sig P938.
• The listed series identifier is AC1756.
• The listed weight value is 0.1 (see notes regarding units).

This piston offers a practical way to configure a SilencerCo Osprey or Octane suppressor for use with compatible, small-profile pistols. Its stainless construction and service-oriented design make it appropriate for shooters who need straightforward, repeatable compatibility between a host barrel and a suppressor. Use this piston when the application requires muzzle indexing instead of shoulder engagement to ensure proper alignment and function with the listed host firearms.