Okay, look at this stuff:
http://www.emachineshop.com/faq/general.htm
http://www.worldchanging.com/archives/001707.html
And then look at the pic
of this handy knicknack. William Gibson
just sent me this. Wow, a custom-detailed, one
of a kind, post-consumer-altered MP5!

Now, if you had the design specs for
one of those, and an "emachineshop" fabber...
The rest would come pretty intuitively to
anybody living under weapons sanctions.
I'm in Belgrade again. Boy, this sure is educational.