Over the past decade, Massachusetts streets have been marked by a rapid surge in homemade weapons with massive firepower. With the rise of illegal devices that can turn semiautomatic pistols into ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. MARTINSBURG, W.Va. – In the basement research lab of the agency that regulates America's firearms, two dozen 3D printers hummed, ...

New York state lawmakers and law enforcement officials are pushing for a bill that aims to curtail the spread of homemade devices that can turn average firearms into machine guns capable of spraying ...

CHICAGO – An operation targeting trafficked illegal firearms and machine-gun conversion devices linked to "violent criminal activity" in Chicago and across the United States yielded over 40 arrests, ...