I remember back in my mischeivious days there were a couple of books I remember looking at, there is a few for making home made assault rifles and shit...

Check these out:
http://www.amazon.com/gp/product/087...lance&n=283155
http://www.amazon.com/gp/product/087...lance&n=283155
http://www.amazon.com/gp/product/087...lance&n=283155