The weapon that was used in the shooting was assembled with pieces and parts from a company called Polymer80, one of the largest manufacturers of kits for making homemade, untraceable ghost guns.

In a 7-2 decision, the justices agreed these homemade weapons, often referred to as “ghost guns,” qualify as firearms under federal law. “Today, thousands of law-enforcement agencies ...

A student brought a fake homemade gun to a middle school in Monmouth County on Tuesday, officials said. The student transported the 3D printed imitation firearm on the bus in the morning before ...