Latest Airsoft Electric Gun produced by Jing Gong available at Gunner Airsoft. This is the "Tanker" version which is loosely based on the G&P Tank and comes with a battery box, and mean looking flash hider which reminds you of a tank, collapsible stock, and a stock tube similar to M4 Patriot kits.  The body is made of plastic and does not come with trades seen in their full metal offerings. Costs US$100 and not sure if it has a MOSFET fitted.