Full metal gear box with gun metal gears (not that cheap aluminum) custom spring and brand new nozzle as well as gears gate titan mosfet mad bull mk. 3 tight bore barrel Lonex 45k high torque motor magpull furniture as well as flip up sights mock peq has milspec green alser multi flash luminator foam filled mock supressor magpull angled forgrip only trades looking for are working hpa units will add cash or other guns if necessary