Compatible with all APX Full Size standard magazines and designed to increase the magazine capacity by 2 rounds (if 9mm caliber, if .40 caliber the capacity is increases by 1 round) and to improve the grip during magazine extraction due to aggressive milling. Will fit all APX series double stack magazines, all calibers. Details: Made in Italy Easily attaches and detaches from the magazine Standard 2mm allen key wrench is needed for assembly the devices and disassemble Two piece design (pad and retention screw) Designed specifically for the Beretta APX series CNC machined from billet aluminum Hard Anodized
