Sig Sauer SRD Piston 45 ACP M16x1 LH 17-4 Stainless Steel Black

The Sig Sauer SRD Piston is a factory .45 ACP conversion piston built for the Sig Sauer SRD45 suppressor. Swapping pistons is the standard way SRD45 owners change thread patterns to run the can on different host pistols, and this left-hand piston is set up for hosts wearing an M16x1 LH thread pitch.

Each piston is machined from 17-4 heat-treated stainless steel for the wear resistance and dimensional stability needed to handle high-pressure .45 ACP firing schedules, then given a low-glare matte black glass bead finish that matches the SRD45 suppressor body. It is a direct factory-spec replacement or spare for the piston that ships in the SRD45, sold in New condition and ready to drop in.