 In 2012, the U.S.-based group Defense Distributed disclosed plans to design a working plastic gun that could be downloaded and reproduced by anybody with a 3D printer.The Liberator is a physible, 3D-printable single shot handgun, the first such printable firearm design made widely available online.The open source firm Defense Distributed designed the gun and released the plans on the Internet on May 6, 2013.