The Strike Industries Extended Magazine Plate for GLOCK(TM) G19 (9mm) was designed to provide smoother magazine reloading through a low drag/no snag design while maintaining maximum magazine capacity with any OEM Double Stack GLOCK(TM) magazine for G19. The Extended Magazine Plate (EMP) provides an additional +5 rounds to any G19 GLOCK(TM) magazine. Included is our special steel locking plate, which compared to other magazine extensions on the market, features a hook design which adds extra locking security to increase reliability when fully loaded with rounds. WARNING: DO NOT OVERTIGHTEN set screw when installing the steel locking plate. Steel locking plate may appear " Mfg: Strike Industries