This gun is an absolute beast. Can be externally configured be either a mk46 or m249 para. Will come with 500 round box mag and dummy ammunition belt. Internal list: SHS piston SHS motor Steel tight bore barrel Pen tube HopUp mod Sorbo pad M110 spring ZCI piston head Will include a G&P 7.4 PEQ box lipo,7.4 butterfly lipo, Flyye RG sling, real KAC vert grip. Price is $350 shipped