I have a model 22A that was given to me and I am totally ignorant of how to take it down. To add salt to an open wound, when I attempted to take it apart to clean it, a long spring with a piece of metal attached?? zoomed past my ear and disappeared into the high grass. Never to be seen again.!!! I do not even know what this part looks like as S&W told me they don't have a schematic of the gun on the net. They will send me a spring and stop pin, but I don't have a clue about how to install it. If you have one of these guns, a photo of this feature would be greatly appreciated. Your thoughts on assembly / disassembly are also requested. Thanks for your help.