EFF Slams Laws Blocking 3D Printed Parts as Anti-Consumer Monopoly

Three state legislatures are trying to mandate "print blockers" on every commercial 3D printer sold within their borders, and the Electronic Frontier Foundation called the wave of bills exactly what it is: a blueprint for OEM monopolies that would criminalize the open-source ecosystem the community has spent decades building.

In the U.S., three states recently proposed that commercial 3D-printer manufacturers must ensure their printers only work with their software and are responsible for checking each print for forbidden shapes. The specific bills are California's AB-2047, Washington's HB 2321, and New York's S.9005/A.10005, all proposed in 2026. Assembly Member Bauer-Kahan introduced AB-2047, the "California Firearm Printing Prevention Act," on February 17. Framed as anti-ghost-gun measures, they share a common mechanism: force manufacturers to build firearm blueprint detection algorithms into every printer, scan every file before it runs, and lock the machine to vendor-approved software. Washington Governor Bob Ferguson signed HB 2320 on March 24, placing severe restrictions on 3D printers in that state.

The EFF's "Permission to Print" series, published April 3, argues the reality behind these bills is far more dangerous than their stated purpose. The mandated censorware is doomed to fail for its intended purpose but will still manage to hurt the professional and hobbyist communities relying on these tools. The legislation forces cryptographic signing of G-Code, locking 3D printer owners into the slicer chosen by their printer vendor. Open-source alternatives like OrcaSlicer would be shut out entirely. The EFF points to Bambu Lab's recent restrictive firmware push as a preview: the community's blowback forced some accommodations for these alternatives to remain viable, but under the worst of these laws, such accommodations and workarounds would be outlawed with criminal penalties.

The EFF identifies intellectual property as a clear expansion risk, warning this could look like Nintendo blocking a Pikachu toy, John Deere blocking a replacement part, or patent trolls forcing the hand of hardware companies. That is the specific monopoly concern buried in what legislators are selling as a public safety measure: once the print-blocking infrastructure is in place, any rights holder or jurisdiction can extend it to any shape they deem forbidden.

"This is exactly the sort of regulation that creates a headache and privacy risk for law-abiding users, is a gift for would-be monopolists, and can be totally bypassed by the lawbreakers actually being targeted by the proposals," the EFF wrote. The vendor lock-in problem compounds over time: making users reliant on a company's service allows that company to gradually sour the deal, sometimes visibly through rising subscription fees, new paywalls, or planned obsolescence, and sometimes more covertly by collecting and selling more user data or cutting costs by neglecting security and bug fixes.

California's bill adds a certification bureaucracy on top: state-approved algorithms, state-approved software control processes, state-approved printer models, quarterly list updates, and civil penalties up to $25,000 per violation. If your printer is not on the approved list by March 1, 2029, it cannot be sold. Knowingly disabling or circumventing the blocking software is a misdemeanor.

Combined, California, New York, and Washington represent roughly a quarter of the U.S. by population and GDP, enough to force every manufacturer to comply regardless of what other states decide. That is the practical reality of the market leverage: these three states will effectively set the hardware standard nationally.

The EFF's second post in the series dismantles the technical premise, arguing that it takes very little skill for a user to make slight design tweaks to either a model or G-Code to evade detection, and once workarounds pioneered by skilled users are out there, anyone able to print a gun today will be able to follow suit. What the laws will reliably accomplish is the part legislators are not advertising: locking makers, educators, repair communities, and small-batch manufacturers into proprietary stacks, with no open-source off-ramp and criminal liability for anyone who tries to build one. "We need to roundly reject these onerous restraints on creation," the EFF concluded.