The SilencerCo Osprey/Octane Piston for .45 ACP with an M16x1 left-hand thread (brand part number AC28) is machined from 17-4 stainless steel and built specifically for .45 Auto-caliber handguns running a SilencerCo Osprey or Octane suppressor on a left-hand-threaded host. It threads M16x1 left-hand to match the barrel, giving the suppressor the correct booster action to cycle reliably on a .45-caliber pistol. It’s a genuine, purpose-matched replacement or spare piston for any Osprey or Octane owner running a left-hand-threaded .45 ACP host.

Key Specifications

• Built for .45 ACP-caliber handguns.
• Threaded M16x1, left-hand.
• Machined from 17-4 stainless steel.
• Compatible with the Osprey suppressor.
• Compatible with the Octane suppressor.

Frequently Asked Questions

Why does this piston use a left-hand thread? Some .45 ACP hosts are cut with a reverse (left-hand) barrel thread, so a matching left-hand piston is required for correct engagement.

What suppressors does this piston fit? The SilencerCo Osprey and Octane.

What’s it made of? 17-4 stainless steel.

Buy the SilencerCo Osprey/Octane Piston, .45 ACP, M16x1 LH

Keep your Osprey or Octane cycling correctly on a left-hand-threaded .45 ACP host. Order it from our SilencerCo lineup, part of our full Class 3 parts and accessories selection, at our Lubbock, Texas gun shop for fast, direct shipping.