"When Cody Wilson revealed the world's first fully 3-D printed gun last year, he showed that the "maker" movement has enabled anyone to create a working, lethal firearm with a click in the privacy of his or her garage. Now he's moved on to a new form of digital DIY gunsmithing. And this time the results aren't made of plastic."
http://www.freedomsphoenix.com/News/163972-2014-10-01-the-1-200-machine-that-lets-anyone-make-a-metal.htm?EdNo=001&From=RSS
http://www.freedomsphoenix.com/News/164047-2014-10-02-the-1-200-machine-that-lets-anyone-make-a-metal.htm
http://www.freedomsphoenix.com/News/164137-2014-10-04-that-1-200-machine-for-making-untraceable-guns-just-sold.htm
this is not an 3D printer but an CNC machine programmed to mill one mayor part of the AR15 rifle anyone making this would still have to find a barrel, stock and magazine for this gun.
I can imagine that in some countries this would not be a problem but in most countries it would be a hard task finding a barrel or magazine for this..
crazy thing is that he sold 175! of these machines in the first 24 hours they were on the market.