The Strike Industries Extended Magazine Plate For SIG SAUER P320 (9mm) was designed to provide smoother magazine reloading through a slow drag / no snag design while maintaining maximum magazine capacity. The Extended Magazine Plate (EMP) adds plus 5 rounds (9mm) to P320 magazines. Following the success of our EMP systems for pistols, the form factor and unique geometric design gives a unified and aggressive aesthetic look to your SIG SAUER P320. Included is a steel locking plate which adds extra locking security. Give your SIG SAUER pistol the extra rounds it deserves with the Strike Industries Extended Magazine Plate (EMP) for P320.