You can order a valve replacement kit and maybe a sight from Pyramid air or have it rebuilt by Mac1 or others. They're good guns and aren't hard to swap valves on. The guys will be along shortly to direct you a bit more, Good Luck!
"Camping places fix themselves in your mind as if you had spent long periods of your life in them. You will remember a curve of your wagon track in the grass of the plain like the features of a friend." Isak Dinesen
