Compatible with all APX FS 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). Made from a single block of aluminum, it features the "Tre Frecce" logo on the side milling. Features: Made in ItalyEasily attaches and detaches from the magazineStandard 2mm key wrench is needed for assembly the devices and disassembleTwo pieces design (pad and retention screw)Designed specifically for the Beretta APX series CNC machined from billet aluminumHard Anodized Beretta APX Tactical Extended Magazine Pad E03178