Our pistons were designed to be easily changed for different host firearms or calibers. Pistons are built with 17-4 stainless steel, then heat-treated for maximum durability. The piston is part of the Nielson device that moves and allows semi-automatic cycling for unlocking pistol barrels. Throw a Fixed Barrel Spacer on for fixed barrel applications. SilencerCo pistons have female threading that attaches to our SilencerCo threaded barrels. Not sure which threads you need? Check our Piston Fit Guide Compatible with

• Omega K Series
• Hybrid 46
• Hybrid 46M with Charlie Piston Mount
• Osprey Series
• Octane Series
• Omega 36M with Charlie Piston Mount

  SKUS

• .578 X 28 (AC24)
• 1/2 X 28 (AC25)
• M13.5 X 1LH XL (AC626)
• M13.5X 1LH (AC26)
• M14.5 X 1LH (AC27)
• M16 X 1LH (AC28)
• M16 X 1RH (AC29)
• 5/8 X 24 (AC30)
• 9/16 X 24 (AC31)
• 1/2 X 36 (AC57)
• 1/2 X 28 XL (AC59)
• .578 X 28 XL (AC1346)
• 1/2 X 28 SN (AC1756)

  XL pistons are for firearms where the silencer requires additional length between the threaded barrel and the silencer. The 1/2x28 SN Piston will index on the muzzle of the barrel instead of the shoulder. This is used on small profile pistol barrels with an inadequate shoulder diameter