The YHM Nielsen Booster Assembly replaces the direct thread adapter on a YHM Sound suppressor or any other suppressor on the market which utilizes the 1-3/8"-24 thread. They are designed to be used on handguns and barrels which require a Nielsen Booster.

Features

• Replaces your 1-3/8"-24 Adapter
• 17-4 Stainless Steel
• Black Oxide
• 1-3/8"-24 Mount Thread Pitch

Yankee Hill Machine Co, YHM-2055 Nielson Booster Assembly, No Piston, Black.