Ghost gun

The term ghost gun refers to an untraceable firearm.

Manufacturers of firearms routinely stamped serial numbers on them, even prior to when legislation required them to do so, for quality control.

Depending on the location, gun owners are typically required to register their weapons, or to undergo a background check, prior to the purchase of their weapons. Depending on jurisdiction governments place restrictions on firearm ownership. Many jurisdiction prohibit convicted felons from owning firearms. There can be age restrictions. Individuals known to have mental illness may be prohibited from owning firearms.

3d printer technology has provided a way for individuals to avoid registration or background checks. According to law enforcement officials, Luigi Mangione, the suspect in a high profile assassination, was in possession of a ghost gun.