Another custom gun from Evike.com, this time a Li-Poly-ready JG M4A1... "This is a customized JG M4A1 with reinforced gearbox, reinforced motor, reinforced gear set, one piece barrel and tight bore barrel to shoot 440~460 F.P.S. out of the box. Because it was done with the best technician team exclusively for Evike.com, the reliability and performance is superb! The 8.4V battery that comes free with the gun might still work with this highly upgraded gun, but we recommend upgrading to a 9.6V or a lipoly for best performance."