World's first 3D-printed gun fired in US
6 May 2013 Last updated at 07:25 BST
The world's first gun made with 3D printer technology has been successfully fired in the US.
The controversial group who created the firearm plan to make the blueprints available online.
Anti-gun advocates have criticised the project and Europol, Europe's law enforcement agency, said it was closely monitoring the development.
Rebecca Morelle reports.