Recently, the U.S. federal government settled a landmark case.
Back in 2013, with the advent of mainstream 3-D printing technology, Texan Cody Wilson came up with a way to literally print a working firearm (if the necessary metal components were added). He made the schematic free on the internet.
Within days (but after 100,000 downloads), the federal government ordered the plans taken offline. Wilson obeyed but sued the government for infringement of First (and Second) amendment rights.
Under the terms of the settlement, he won.
In response, Wilson tweeted an image of a gravestone marked “American Gun Control.”
(Finish reading at: http://www.startribune.com/3d-printed-guns-technology-government-and-you/489569301/)