For Father's Day, 1996 my wife bought me a Ruger 10/22 - the standard carbine with the pencil barrel and the youth-sized stock. "Oh my love," I told her, "you don't know what you've started."
Within three weeks I had converted it to this:
I don't even want to know how much money I've got tied up in that thing. The only original parts are the receiver and the bolt assembly.