B&T Piston / Booster M13.5x1LH for use with OLS & IMPULS Suppressor for USP9 Tactical, Etc for sale
BT-122748 – OLS Impulse Adapter M13.5x1LH
This Piston can be used with the new OLS M Suppressor or IMPULSE Suppressor, it enables use with firearms threaded in M13.5x1LH like the USP9 Tactical and similar.