The Strike Industries Enhanced Magazine Plate for the S&W M&P 9 and .40 Shield blends seamlessly with M&P shield. The EMP increases the capacity of the M&P 9 by 2 rounds and .40 Shield by 1 round. Although the grip surface is extended, you will still be able to comfortably conceal and carry your weapon. Note: It works best with 7-round capacity 9mm magazines and 6-round capacity .40 cal magazines. It will also function with larger capacity magazines but with a noticeable gap between the EMP and pistol grip. The factory spacer will not fit flush with the EMP without modification.