hmm Osiris that sucks if yours is broken. I dont really mess with the pumps on any of my guns so I wouldnt know how to help you.
Anyways one more thing for everyone with an lbb, make sure there are no leaks between the orange barrel thats glued onto the air tank. YOu should seal it, mine wasnt glued properly
yeah you cant use hot glue / duct tape to stop leaks even epoxy, it doesnt work very well, you have to use something called plumbers goop. Its about 8 dollars in canada, kind of expensive but it would be cheaper if you're in the US and you can find it in hardware stores and probably in walmart.