For the last hour, in a backroom of a gun range in Arabi, Louisiana, I’ve been building Luigi Mangione’s gun. Well, not his, in the literal sense. The not-quite-finished firearm in my hands is very ...

As police departments around the country report a surge in 3D-printed firearms turning up at crime scenes, gun safety ...

From aerospace and medical purposes to fashion and automotive innovations, there are nearly limitless possibilities of 3D printing for prototyping, manufacturing and customization. A 3D printer ...

The arrests were part of a weeklong crackdown on illicit weapons and come after a spate of gun violence in Sydney.