custom built g&g m4. obviously more m16 platform. It’s got 16:1 shs, metal piston,dytac mosfet asg 30k boost, m110 spring, steel bearings and Shoots 375-380 with .20s. prowin hop up with a standard 6.03 barrel. anything tighter will shoot over 400 will classify as a DMR in outdoors fields. gun is less than 3ft from tip to stock. will come with one basic 9.6nihm and 2 hi caps. trades are welcome. local is preferred