You can find reseal kits for the 760 Powermaster, and a whole raft of other classic air rifles, at www.bryanandac.com . The kits aren't cheap, but I'd rather reseal a classic 760 than replace it with one of the less substantial new models.got2bqik said:I recently retrieved my 760 crossman pump rifle from my parents house. It needs a rebuild it won't hold air. Looked online but couldn't find a o-ring kit for it.