This guy built an AK47 out of a shovel. (well the receiver and stock anyhow) Some of the other bits are a little more tricky. Vodka appears to be an important factor as well.
http://www.northeastshooters.com/vbulletin/threads/179192-DI...
http://www.northeastshooters.com/vbulletin/threads/179192-DI...