Yankee Hill Machine Nielsen Piston 1/2-36 9MM Silver – Pistol Caliber Suppressors

The YHM Nielsen Piston enables reliable cycling in tilting-barrel pistols when using a suppressor. Without a Nielsen device (also called a booster or linear inertial decoupler), most browning-style handguns will not cycle properly when suppressed because the added weight of the silencer prevents the barrel from unlocking. This piston solves that problem by allowing the barrel to recoil independently while keeping the suppressor stationary.

Designed for 9mm pistols with 1/2-36 threaded barrels, this piston is machined from stainless steel with a durable silver finish. It threads directly onto your barrel and interfaces with Nielsen-compatible suppressors. Installation is straightforward: remove your thread protector, thread the piston onto the barrel, then attach your suppressor to the piston assembly. Confirm your specific suppressor model uses a Nielsen device before purchasing.

• Type: Nielsen Device / Booster Piston
• Caliber: 9mm
• Thread Pitch: 1/2-36
• Material: Stainless Steel
• Finish: Silver
• Compatible Firearms: 9mm pistols with 1/2-36 threaded barrels
• Use: Pistol caliber suppressors with Nielsen device compatibility