Blueprints for the 3D Liberator printed gun have been downloaded more than 100,000 times

"The blueprint used to produce a 3D-printed plastic gun has been downloaded about 100,000 times since going online earlier this week, according to Forbes.
Defense Distributed told the news site it was surprised by the amount of interest its Liberator gun had generated.
Earlier in the week, the company demonstrated the firearm being fired
But even before any more guns come off the DIY printing presses, there are moves afoot to ban it."

Source:  BBC News, 9th May 2013