The popular Strike Industries EMP +2 magazine extension for the Glock 42 and 43 is now available for the S&W M&P 9 and .40 Shield. The Enhanced Magazine Plate increases the capacity of the 9 Shield by 2 rounds, and the .40 Shield by 1 round. The molded design integrates seamlessly with the ergonomics, texture and styling of the M&P Shield and conceals well, despite the added length. Increase your firepower and ergonomics without sacrificing feel or looks. 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. WARN Mfg: Strike Industries