BB airsoft gun failed to shoot

[NGKGTATT]

Hi, last year on october i got a Heng Long German King Tiger, currently the tanks BB gun stop shooting BBs. I have put BB bullets into the compartment and no BB bullets shoot out, only pockets of air shot out from the cannon. Any ideas?
RC tank's airsoft gun broken?

[afv]

Hi, it could be the rubber seal inside the bb unit or the little piece inside the breach broken ( see attached picture ),

[NGKGTATT]

Hi, it could be the rubber seal inside the bb unit or the little piece inside the breach broken ( see attached picture ),

Is there a way to fix this myself? Can you show me how?

[afv]

yes you can but you'll need to open up the tank and the turret, if it's only the rubber seal that's moved you can replace it, if the bit in the breach is broken better to get a new unit, I've put up a couple of pictures that show the basic tank opened they are not king tiger but it's nearly all the same. When the bb unit is out you'll have to open that as well or maybe you'll find something wrong before you get that far, I could be that the bb's are just jammed inside the chute that feeds the b unit.