A gun kit is a gun the same way an unassembled table is still a table, Justice Gorsuch says in delivering the majority opinion.

Prosecutors in New York are warning 3D-printing companies their "insufficient security measures" are causing a "troubling rise in access to unregulated weaponry."

The U.S. Supreme Court upholds regulations on so-called "ghost guns," weapons made from kits. Two bills in the Florida Legislature ban them.