California's 3D-Printer Gun-Ban Bill Draws Unlikely Foes: Hollywood Prop Makers

A Bill Aimed at 'Ghost Guns'

California already has some of the nation's toughest gun laws, but state lawmakers say a new technology is letting criminals build firearms from scratch. By using a 3D printer, they warn, lawbreakers can manufacture key components of untraceable "ghost guns" at the press of a button. In response, legislators are advancing a bill that would require every 3D printer sold in the state to ship with software that blocks users from making triggers and other regulated gun parts.

The proposal passed the Assembly in May and is now moving through the Senate. Supporters frame it as a common-sense extension of existing ghost-gun crackdowns: federally tracked recoveries of privately made firearms jumped from roughly 1,600 in 2017 to nearly 27,500 in 2023, with California leading the nation over that span.

Hollywood Pushes Back

The bill has drawn an unusual coalition of opposition. Civil-liberties groups and tech companies warn that "firearm-blocking software" would also prohibit legitimate designs and open makers up to government or corporate surveillance. Among the most visible critics are Hollywood's special-effects studios.

Inside a San Fernando workshop, Samuel McBride — a lab manager at Legacy Effects, the studio behind movie monsters and animatronics — builds lifelike props on a 3D printer, including the trigger mechanism that activates an animatronic hand. He worries the law would make that everyday work off-limits. "The technology has transformed the work," he told the Los Angeles Times, "but he's worried it will soon be off-limits because of a proposed change in California law."

3D-printing advocate David Tobin has been recording social-media videos with Legacy Studio employees to rally opposition, arguing the restrictions are too broad and would sweep in harmless, career-critical fabrication.

Why Makers Should Pay Attention

For the desktop 3D-printing community, the stakes go well beyond California. If printer manufacturers are forced to embed part-blocking firmware to sell in the state's large market, that functionality could become the default everywhere — affecting everyone who prints functional parts, cosplay props, jigs, or replacement components. Teachers who use printers in classrooms have also joined the pushback, concerned the software would falsely flag ordinary educational models.

The outcome will be watched closely as a test case for how far governments can go in regulating the tools of fabrication rather than the objects themselves.

Read the full report at the Los Angeles Times.