ares Amoeba 13.5" EFCS gearbox quick change spring guide 363mm tight bore barrel Maple leaf bucking Krytac iron sights M100 spring shooting 340(can put a spring in that shoots 360) Programmed to 3rd burst (rapidly pull for full auto, it's so fun) Amazing "mouse-click" trigger response High cap Buyer pays shipping May switch gearbox out with a Krytac nautilus And the stock to a Krytac Trades welcome I'd like to trade for an hpa system maybe in a gearbox