Yankee Hill Machine Nielsen Piston 1/2-28 Thread – 9mm Suppressors

The Yankee Hill Machine Nielsen Piston enables reliable cycling of tilting-barrel 9mm pistols when a suppressor is attached. This spring-loaded booster decouples the suppressor from the barrel during the unlocking cycle, allowing the slide to move freely and the firearm to function as designed. Without a Nielsen device, many browning-type pistol actions will short-stroke or fail to cycle under the added weight and inertia of a suppressor.

This piston features 1/2-28 threads for direct attachment to most 9mm pistol barrels. Constructed from durable steel with a silver finish, it installs between your threaded barrel and compatible suppressor. Check your suppressor manufacturer's specifications to confirm piston compatibility before purchase.

• Type: Nielsen Device / Booster Piston
• Thread Pitch: 1/2-28
• Caliber: 9mm
• Material: Steel
• Finish: Silver
• Compatible Firearms: Tilting-barrel 9mm pistols with 1/2-28 threaded barrels