My sons and I were discussing current events today and the subject of Printable Guns came up.  Along with other topics such as how most new tech is driven by the porn industry….
So, were talking about the 3D printers will one day combine printing circuits which will allow you to print a drone, and the controller for it.  And print your own robot…. And once the porn industry gets a hold of it, you can take creeper pics of some hot chick you saw, then go home and print her as a Lovebot to molest… Or download a celebrity. 
Back to the gun issue.  ITAR shutting down the plan for a 3D printable gun is the government building sandcastles in front of the coming tide.  It’s futile.  The cat is out of the bag.  And since schematics and detailed plans are already out there for most any type gun… The only issue is one of material science.  And instead of printing a gun, print molds to make guns out of better materials.
Colt started out with a wood carved revolver… Now look at it all.  I’m looking forward to seeing what happens next.