Following the creation of a 3D printed gun by US student Cody Wilson, the news has been awash recently with stories of how, soon, anyone will be able to make their own plastic gun using in-home 3D printers. Regardless of obvious concerns over gun control, experts have warned these products could harm or even kill their users. To find out more about 3D printing, how it works and whether it could be used to create a working gun, we spoke to Jonathan Rowley, design director at London-based 3D printing firm Digits2Widgets.