Strike Industries Extended Mag Plate Features The Strike Industries Extended Magazine Plate is machined from 6061-T6 aluminum to hold up to the rigors of repeated competition and duty use while adding a genuine plus 5 round capacity increase to 9mm P320 magazines. It is designed to fit OEM 21 17 and 15-round magazine bodies with the included extended length spring intended for use with the 21-round magazine to properly fill out the added capacity. The plate s slim low drag no-snag design keeps overall width to a minimum which matters both for concealment and for competitive shooters working within the USPSA 140mm race division limit. A simple intuitive installation process means most shooters can swap plates themselves with the included hex tool. Two set screws secure the plate to the magazine body torqued to no more than 7 in/lbs to avoid stripping and the package includes the plate extended spring screws hex tool and a warning card covering break-in. New magazines may initially only achieve a plus 4 capacity gain until the spring fully breaks in after which the full plus 5 capacity is realized. The anodized black finish matches most P320 builds and resists wear from holster use. Shooters running a P320 in competition or for daily carry gain extra rounds on tap without sacrificing the pistol s compact low-drag profile. Strike Industries Extended Mag Plate Specifications Manufacturer: Strike Industries Model: Extended Mag Plate Caliber: 9mm Compatible Hosts: Sig Sauer P320 Color: Black Material: Aluminum Capacity Increase: +5 Rounds Length: 1.37 Weight: 1.97 oz Available At: GrabAGun