One of my friends has a BAM .50 and he feeld it needs a service, he think it is leaking. I think one of the seals went and needs replacing but I'm very bad with these things so is he. If any body can help us to service the rifle it would be great. He also heard about the shim you guys put in the front filling valve to help it not braking and would like that done aswell.
If anyone can help please.