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 thirty-plus rounds in seconds.

The White House says action is needed against an emerging threat, with some guns costing as little as 40 cents.

President Biden on Thursday will sign a new executive order on gun violence prevention, aiming to crack down on 3D printed guns and to improve active shooter drills at the nation’s schools. The president and Vice President Harris will both give remarks on the new orders,