The Yankee Hill Machine Co Nielsen Pistons are compatible with the YHM booster housing YHM-2055 as well as many popular pistol suppressors. Constructed from heat treated 17-4 stainless steel for maximum durability and corrosion resistance. The Nielsen Pistons feature 10 adjustment points to zero any impact shift.
Threads: M13.5x1LH
Caliber: 9mm
Threads: M13.5x1LH
Caliber: 9mm
