Print your own guns! The dangers of 3D printing…

This week's top tech hits and misses are dissected by George Berkowski, head of product at Hailo, the free smartphone app that matches customers with the nearest available black cab in just two taps - launched by three London cab drivers and three Internet entrepreneurs to bring the black cab service into the 21st Century.

Fans of open source, users of craftwork websites such as Etsy.com and digital artists are getting very excited about the possibilities for using increasingly cheap 3D printers in the home, with the potential for creating your own personalised sculptures and product samples almost endless. Yet there is a dark side to 3D printing that not many companies have touched on to date - the potential to print your own GUNS!

George says:"Guns don't kill people, printers do. The right to bear open-sourced-3D-printable-at-home weapons is a cornerstone of the US constitution. An exaggeration perhaps, but I can see the NRA smiling already."