The SilencerCo Piston in 9/16×24 (SilencerCo part no. AC31) is a 17-4 stainless steel piston that mounts a SilencerCo pistol suppressor to a threaded pistol barrel. It is heat treated for durability. It is the moving part of the Nielsen device, which lets a pistol cycle while the barrel unlocks. SilencerCo designed its pistons to change between host firearms or calibers, and this SKU is the 9/16×24 thread. Matching that thread to your barrel is the whole job.

Key Specifications

• The thread is 9/16×24, which has to match the threaded pistol barrel.
• Construction is 17-4 stainless steel, a strong, corrosion-resistant steel for a part that moves every shot.
• The piston is heat treated for maximum durability.
• It is the moving part of the Nielsen device, which allows semi-automatic cycling.
• It has female threading that attaches to SilencerCo threaded barrels.
• Fixed-barrel guns call for a Fixed Barrel Spacer, which is sold separately.
• It is listed for the Omega K Series and Hybrid 46.
• It is listed for the Osprey, Octane and Spectre Series.
• It also works with the Hybrid 46M and Omega 36M when paired with a Charlie Piston Mount.
• Pistons can be changed between host firearms or calibers.

Frequently Asked Questions

Which suppressors use this piston? SilencerCo lists the Omega K Series, Hybrid 46, Osprey Series, Octane Series and Spectre Series, plus the Hybrid 46M and Omega 36M with a Charlie Piston Mount.

What do I need for a fixed-barrel gun? SilencerCo says to add a Fixed Barrel Spacer for fixed-barrel applications.

Is 9/16×24 the only thread? No. SilencerCo makes the piston in many threads, and the SKU you buy has to match your barrel.

Buy the SilencerCo Piston, 9/16×24 Thread

The right piston thread lets a pistol suppressor cycle the way it should. Order it with our suppressor parts and accessories from our Lubbock, Texas gun shop for fast, insured shipping.