Beretta Magazine Extension Beretta APX 9mm +2 Rounds Black 2. 40 caliber the capacity is increases by 1 round) and to improve the grip during magazine extraction due to aggressive milling. Specifications for Beretta Beretta APX 9mm +2 Rounds Magazine Extension: Manufacturer: Beretta Color: Black Magazine Capacity: 2 Round Caliber: 9mm Luger Gun Make: Beretta Gun Model: Beretta APX Features of Beretta Beretta APX 9mm +2 Rounds Magazine Extension 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 Package Contents: Beretta Beretta APX 9mm +2 Rounds Magazine Extension What firearm models does the manufacturer say Beretta Beretta APX 9mm +2 Rounds Magazine Extension is compatible with? The manufacturer suggests that Beretta Beretta APX 9mm +2 Rounds Magazine Extension is compatible with Beretta APXBeretta E02935: Magazine Extension Beretta APX 9mm +2 Rounds Black