Police said Luigi Mangione, the man charged in the killing of UnitedHealthcare CEO Brian Thompson, appears to have had a ghost gun, a weapon that can be made using a 3D printer.

Ghost guns have no serial numbers ... requiring all gun kits and other key gun parts to include serial numbers, to only be sold by licensed gun dealers and for buyers to to be subject to a ...

the firearms dealer and original purchaser. Ghost guns, however, are made of parts that the owner can assemble together. The critical component in building an untraceable gun is what is known as ...

Ghost guns are typically assembled at home using parts, kits or even pieces printed ... serial numbers and that people who buy them from dealers be subject to background checks.

Federal law requires licensed firearms dealers to conduct background checks ... announced a federal rule that would clarify that ghost gun parts qualify as traditional firearms, and manufacturers ...

“He was in possession of a ghost gun that had the capability ... for the first time that the kits include serial numbers and that people who buy them from dealers be subject to background ...