The Yankee Hill Machine 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. They are designed to be used with handguns and barrels which require a Nielsen Piston spring.
Note: DOES NOT INCLUDE PISTON
- Replaces your Direct Thread Adapter
- 17-4 Stainless Steel
- Matte Black Finish
- 1-3/8”-24 Mount Thread Pitch
Made In United States of America