Pics forthcoming, I bought several air rifles at a local flea market a few days ago, including a synthetic stocked Crosman 1077. It appears to be in good condition but missing the complete clip and magazine. MY QUESTION ... Can I insert a fresh CO2 cartridge and test fire it as is (no clip & magazine) before I purchase the missing parts? I don't want to damage the gun, but also don't want to spend $30 for the parts if the gun is no good. Thanks.