The SilencerCo Piston in M14.5×1 left-hand thread (SilencerCo part no. AC27) is the mounting piece for SilencerCo’s Osprey and Octane pistol suppressors on a barrel cut to that thread. It is made from 17-4 stainless steel and heat treated for durability. It is the part of the Nielsen device that moves, letting a semi-automatic pistol cycle as the barrel unlocks. Its female threads screw onto the muzzle of the host pistol. The M14.5×1 LH thread is listed for .40 caliber hosts.

Key Specifications

• The thread is M14.5×1 left-hand, which has to match the host barrel.
• The material is 17-4 stainless steel, a strong, corrosion-resistant alloy.
• It is heat treated for maximum durability.
• It is the moving part of the Nielsen device, which lets the pistol cycle semi-automatically.
• Female threads let it attach to the threaded muzzle of the host pistol.
• It is made for the Osprey and Octane suppressor families.
• The thread is listed for .40 caliber hosts.

Frequently Asked Questions

What is the M14.5×1 LH piston used for? It mounts an Osprey or Octane suppressor to a pistol barrel threaded M14.5×1 left-hand and lets the pistol cycle.

Can I use the same suppressor on another pistol? Yes. SilencerCo designs its pistons to be changed between host firearms, so the thread you need depends on the barrel.

What is it made of? 17-4 stainless steel, heat treated for durability.

Buy the SilencerCo Piston, M14.5×1 Left-Hand Thread

The piston thread has to match the barrel exactly, and this M14.5×1 left-hand version covers that thread. Order it from our Lubbock, Texas gun shop for fast, insured shipping, and browse more suppressor parts and accessories while you are here.