The Yankee Hill Machine Sidewinder Piston in 9mm with a 13.5×1 left-hand thread (brand part no. YHM-3245-M) is a booster piston built for the Sidewinder suppressor platform on 9mm pistol hosts using the 13.5x1LH thread pattern common to Glock OEM threaded barrels. It lets the barrel move independently of the suppressor’s added mass, which is what keeps a recoil-operated 9mm pistol reliably cycling with a can attached. As a wear item, it can be replaced on its own as springs and seals age. It ships as a standalone service part, separate from the suppressor tube.

Key Specifications

• Chambered for 9mm, matching the pressure and bore diameter of that pistol cartridge.
• Threaded to 13.5×1 left-hand, the common Glock OEM factory-threaded barrel pattern.
• An overall length of 6 inches covers the full piston assembly.
• Built for the Sidewinder suppressor platform, allowing independent barrel movement for reliable cycling.

Frequently Asked Questions

What thread pattern does this piston use? It’s threaded 13.5×1 left-hand, the common pattern on Glock OEM threaded barrels.

What caliber is it chambered for? It’s chambered for 9mm.

Is this a wear item I’ll need to replace? Yes, pistons see wear over time from repeated cycling and can be replaced independently of the suppressor.

Buy the Yankee Hill Machine Sidewinder Piston, 9mm 13.5x1LH

Order the Sidewinder Piston, 9mm 13.5x1LH from our Lubbock, Texas gun shop for fast, direct shipping. See more Class 3 parts and accessories.