Why ghost guns are so easy to make — and so dangerous

The shocking broad-daylight shooting of UnitedHealthcare CEO Brian Thompson on Dec. 4 was carried out with a homemade firearm that alleged shooter Luigi Mangione may have created with a 3D printer. The increasing use of such weapons, often called “ghost guns,” has raised troubling new questions about the easy availability of homemade firearms and the challenges they pose to both public safety and the ability of law enforcement to solve crimes.

How do ghost guns work?

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