The Mad Bull AGX is a pistol type launcher. You can either use it as a pistol or mount it on your RIS. The AGX's design is based on the real AGC launcher but made to only fire BB shower shells. This launcher is slightly smaller diameter and only fits MADBULL BRAND 37mm diameter MADBULL grenade shells only. Note that some of the early Madbull shells are 40mm and are too large to fit into this launcher. King Arms and Mosquito Molds 40mm shells will NOT fit.