My review for the Jing Gong M4A1, the sound is a little messed up and picture isn't the best, there's nothing I can do about it. I got this gun from airsoftgi. The video is in two parts.. UPDATE: I have found that it is a little hard to get the battery in. But have figured out the easiest way of going about it. This is how... REMOVE THE TOP HALF OF THE GRIP TO EXPOSE THE WIRES AND CONNECTORS, HOLDING THE GUN LIKE YOU WOULD TO SHOOT IT (barrel out) SLIDE THE FUSE AND CONNECTOR UNDER THE BARREL TO THE LEFT SIDE OF THE GRIP-NOW, PLACE YOUR BATTERY IN THE RIGHT HALF OF THE GRIP AND CONNECT THE BATTERY.. NOW THE TOP HALF OF YOUR GRIP SHOULD GO ON EAISER.....THIS IS HARD TO EXPLAIN SO I WILL MAKE A VIDEO OF IT.... This is the Jing Gong m4...The version 1 and 2 both have a abs plastic gearbox. But they are very strong, almost like metal...You can buy an aftermarket gearbox tho. How did you add the silencer? You need to use a 1/16 allen wrench to unscrew the ORANGE flash hider. It's really small so.....AFTER that just unscrew the tip, it unscrews clockwise not counter clockwise. ( so turn it to the right to unscrew) then, simply screw on the new flash hider/silencer. (to install your new flash hider screw it on counter clockwise, TO THE LEFT) Tags: airsoft review jg m4a1 jing gong silencer abs rof fps good gun airsoftreview