Assistant District Attorney Bonnie Seok points to the lime green 3D printed auto sear slotted into an illegal ghost gun during a roundtable at the Manhattan D.A.’s Office. Credit: Tandy Lau ...

Once he was stopped, officers found a gun "equipped with an illegal auto sear," commonly known as a Glock switch. The illegal devices can transform a regular handgun into a machine gun.

Hill was then arrested and charged with possession of an auto sear, discharge of a firearm within city limits, reckless handling of a firearm and two counts of obstruction of justice. Police said ...