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

The US Supreme Court on March 26 upheld the federal regulation of built-at-home “ghost gun” kits, backing a rule put in place during the Biden administration to stem what officials said was a torrent of untraceable weapons.

The Supreme Court ruling affects ghost guns, the largely untraceable firearms used in a growing number of crimes over the past decade.