A tiny, cheap device known as a "Glock switch" or a "machine gun conversion device" allows criminals to convert a handgun into a machine gun and unleash 30-plus rounds in seconds, federal authorities ...

Since the first 3D-printed gun was fired more than seven years ago, the technique has loomed as a potential tool to arm individuals with lethal weapons they couldn't otherwise legally obtain. Now ...

DENVER — Federal court records show two men are accused of running a sophisticated illicit business in which they used a 3D printer to sell devices that convert guns into machine guns. An indictment ...