Strike Industries Extended Mag Plate Features The Strike Industries Extended Mag Plate is machined from 6061-T6 aluminum for a durable lightweight upgrade over the factory Sig Sauer P320 magazine floor plate. It adds a plus 5 round capacity increase to the 9mm platform giving shooters more rounds on tap without switching to a bulkier magazine. The slim low drag no snag design keeps the magazine s profile close to factory dimensions so it still runs smoothly in most P320 grip modules and holsters. Its 1.97 ounce weight keeps the added capacity from meaningfully changing the balance of a loaded magazine. Installation is straightforward using two M4x3mm set screws and the included 2mm hex tool and the plate ships with an extended length spring built for the 21 round magazine body. Because the plate is sized to the USPSA 140mm race division limit it is a practical option for competitors who want more capacity without running afoul of division rules. The plate is available in anodized Flat Dark Earth or black finishes allowing shooters to match their existing P320 setup. Factory OEM Sig Sauer P320 15 17 and 21 round magazines are all compatible while 10 round magazines and most aftermarket magazines are not. Strike Industries Extended Mag Plate Specifications Manufacturer: Strike Industries Model: Extended Mag Plate Compatible Hosts: Sig Sauer P320 Caliber: 9mm Color: Flat Dark Earth Material: Aluminum Capacity Increase: +5 Rounds Length: 1.37 Weight: 1.97 oz Available At: GrabAGun