ProMag PM050 Floor Plate 9mm Luger/40 S&W, Compatible w/Glock Magazines,

Made in the USA, these floor plates add two additional rounds to Glock 9mm magazines, and one additional round to the 40 S&W magazines. They also provide an additional gripping surface for more positive control of the pistol. It is constructed in black, injected-molded polymer. This 2-pack can convert two magazines with no permanent modification required.