Ok I bought a jg m4 ris s-system from airsoftmegastore.com. When I got the gun I charged the battery and loaded the clip. After a while when I went to test it and the gun wont shoot properly. On full auto the gun shoots one time then just makes the sound like it is shooting but nothing comes out. At first I thought the clip just wasnt working properly and bought a new clip but this didn't solve the problem. If anyone knows whats wrong and can give me the steps to fixing it I would be very appreciative!