A single Evolution 9 or Ti-RANT 9 silencer can be used on a variety of host firearms w/different barrel threads by quickly & easily swapping out the threaded A.S.A.P. piston in the rear of the silencer All Evolution/Ti-Rant Series Pistons feature heat treated stainless steel a matte bead blasted finish & engraving to identify the thread diameter pitch and direction of rotation for installation. - Cal.: 9mm - Thread: M13.5x1
Determined at checkout.