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. They are designed to be used with handguns and barrels which require a Nielsen Piston spring.
Replaces your Direct Thread Adapter
17-4 Stainless Steel
Matte Black Finish
1-3/8”-24 Mount Thread Pitch
*DOES NOT INCLUDE PISTON*