A new U.S. federal law aims to restrict the use of 3D printers to manufacture firearms. The legislation, involving agencies like the Bureau of Alcohol and the U.S.

Department of Justice, affects manufacturers, hobbyists, and gun rights advocates. Supporters argue it will curb untraceable 'ghost guns,' while opponents raise concerns about innovation and rights.

The California legislature and advocacy groups such as the Electronic Frontier Foundation are involved in the debate. The law's implementation details and enforcement remain under discussion.