KJW Mad Max Double Barrel Shotgun Airsoft Gun

Only one shot gun shell works, the other leaks all out. I bought some more o-rings and replaced but still not working. Also u really have to press the trigger hard to fire the shotgun shell. If it doesn't fire and u open the shot gun and remove the shell it almost took my eye out. I have a complete black eye where the shell exploded and hit me. It's a very horrible and dangerous design. Wish I could get my money back!