So I kinda inherited a Crosman 760 XL airgun. Love these things, taught my son how to shoot 20 years ago with similar. Trying to figure the rebuild kit for this, not pumping air. Serial # 878051172 I think. I can buy stuff easier for the M10, M14 and M15 than this. Love these toys, and want my grandson to have this one right next to Red Ryder...