Yankee Hill Machine Nielsen Piston 9mm 1/2x28 Stainless Steel

The Yankee Hill Machine Nielsen Piston is a precision-engineered 9mm Luger suppressor accessory designed for use with YHM's booster housing. Constructed from heat-treated 17-4 stainless steel, this piston delivers maximum durability and corrosion resistance while keeping weight to a minimum at just 1.40 oz.

Featuring 10 adjustment points to zero any impact shift, the Nielsen Piston threads in at 1/2x28 and is purpose-built to optimize suppressor performance on 9mm host firearms. Its stainless construction and precision fitment make it a go-to replacement or upgrade piston for shooters running YHM booster-equipped suppressors.

Made in the USA by Yankee Hill Machine, this piston is sold as a standalone suppressor accessory and is compatible with YHM booster assemblies.