Used Good condition New VFC gearbox with QD system, piston with steel teeth, metal piston head, metal cylinder head) High torque SHS motor. 2.2 J. on 0.28 bbs. Just change spring for more J. M60 boxmag for best feeding. T connector. Prometheus hop-up 650mm 6.03 inner barrel with extra spacers Shipping to US ca 200 USD.