Glock switches were involved in 58 incidents in Seattle over two years, with shell casings at crime scenes more than doubling ...

The 3D-printed Glock switch is part of a broader category of highly illegal weapon parts called machine gun conversion devices. These are outright illegal to own or create — not just sell.

On Friday, Detroit police revealed how they discovered a teenager was making 3D printed guns in his home.

Soto Melendez used a 3D printer to make Glock switches at his Park Hills home and another man sold the devices, prosecutors said.

A Baton Rouge man and woman were arrested on Tuesday for allegedly printing, constructing and selling Glock switches after authorities searched their apartments, according to police.

It was determined the Glock switch had been 3D-printed. The passenger told police the gun belonged to Moubarak, who refused to answer questions from police, according to the affidavit.

Also a 3D-printed glock switch was recovered, and some other tools that would help in the manufacturing of said devices," Connor said.

FAYETTEVILLE -- A man police said had an altered Glock pistol in his car pleaded not guilty in Washington County Circuit Court on Monday to possessing a machine gun.