Warne M&P 9/40 Magazine Extension, Gray - 3314

This magazine extension is designed for Smith & Wesson M&P 9mm and .40 S&W magazines, adding 5 rounds to 9mm magazines and 4 rounds to .40 magazines. Constructed from 6061 T6 aluminum billet with a Type 2 anodized gray finish for durability and corrosion resistance.