Krytac Gearbox. Wired to deans, has the stock mosfet. Works great and cycles smoothly. The nozzle has a little wear on it, which I put as the second picture. The spring I have in shoots low to mid 300s, but I can also include one that shoots (I think) high 3s at no extra charge. Has the quick change spring system. Price is shipped. Cash is king but I'll entertain offers.