If the motor makes sounds and it sounds like the gun fires but nothing comes out you may have a jam if you used the original bbs that came in the little box. More then likely your breach is busted. You can attempt to glue it back together or order another one from Mato (sells the whole airsoft unit in pairs). Another option would be to buy A6 VS airsoft unit from Toy East. When you get it, swap over all the internals, including the barrel and breach into your Heng Long housing. You'll experience 65% better performance and have a much more reliable gun, provided you use quality bbs.