If you ever thought you could prevent people from getting their hands on a gun by making purchases more difficult (or banning them entirely), think again. Here's how you can make a 12 gauge shotgun out of common plumber's pipe, for a total expenditure of just seven dollars. I've chosen to skip the introductory material and start the video at the actual build point. If you'd like to see the whole thing, click here to view it on YouTube.
I can think of half a dozen backyard mechanics who could turn out these things by the score. There are even examples whose barrels have been made out of PVC (plastic) pipe, rather than metal!
Gun control won't work. That cat's long out of the bag.