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 3824. They are designed to be used with handguns and barrels which require a Nielsen Piston spring.
STOCK NOTICE: This item is NOT marked "In Stock". We will contact you within 12-24 hours by email if your order is on backorder with our distributor and will take longer than the 5-7 business days it takes us to ship out. Please do not order if you need this item shipped immediately.