The MagPulMIAD Gen 1.1 Grip Kit features interchangeable frontstraps and backstraps for a truly custom fit. Also features an internal cavity that, when paired with optional core inserts, can hold several types of batteries, extra ammunition or even a replacement bolt and firing pin. Kit includes MIAD pistol grip, 3 backstraps, 2 frontstraps, core insert plug that holds 3 rounds of 223 Remington ammunition and all required installation hardware.