Pearce Grip Grip Extension, Fits Springfield XD Mod 2 9MM and 40SW, Not for Use on XD Mod2 45ACP PG-XDMOD2 These units replace the magazine floor plate and internal floor plate on the 9mm (13 round only) and 40 S&W. They will add approximately 1" inch in length and additional capacity.(2 rounds to 9mm and 1 round to the 40 cal.)