SilencerCo Piston M14.5 x 1LH | .40 S&W

This SilencerCo piston is a replacement piston manufactured from 17-4 stainless steel and specified for .40 S&W pistols. It uses a 14.5mm x 1 left-hand (LH) thread pattern and is intended to interface with SilencerCo threaded barrels and the Nielson device to allow semi-automatic cycling. The piston is compatible with several SilencerCo suppressor series and is designed for range, competition, and conversion applications where matching the host firearm’s thread pattern is required.

Product Specifications

• The product type is listed as a Piston.
• The piston is specified for .40 S&W caliber.
• The thread pattern is M14.5×1 LH.
• The NFA thread pattern is 14.5x1mm LH.
• The piston is made from 17-4 stainless steel.
• The finish is listed as Stainless Steel.
• The series notation is Piston 14.5M x 1LH.
• The piston is noted as compatible with Omega K Series, Hybrid 46, Hybrid 46M with Charlie Piston Mount, Osprey Series, Octane Series, and Omega 36M with Charlie Piston Mount.
• An additional feature lists compatibility threads for M&P, Sig, HK, Walther host barrels.
• The description field reiterates the thread as M14.5×1 LH.
• The material/finish designation is Stainless Steel.
• The listed weight is 0.1 (unit not specified in source data).
• The product is identified as a Piston for Osprey/Octane in additional features.
• The UPC for this item is 817272010176.

This piston provides a direct way to match a host pistol’s thread and Nielson device requirements when installing compatible SilencerCo components. Its heat-treated 17-4 stainless construction emphasizes durability for repeated range use and competition settings where consistent cycling and robust materials are priorities. If you need a serviceable piston to pair with Osprey, Octane or related SilencerCo systems, this part offers the specific thread and material spec required for those installations.