California lawmakers are at it again. A newly introduced bill, California Assembly Bill 2047, would impose sweeping new restrictions on 3D printers sold in the state.

Introduced by Assemblywoman Rebecca Bauer-Kahan, AB 2047 would require any 3D printer sold in California to include DOJ-approved software capable of scanning and blocking files used to print firearms or gun parts. Manufacturers would have to submit their devices for approval, and only printers meeting these requirements would be allowed for sale—essentially creating a new state “roster” of approved 3D printers.

Under the proposal, printers must scan CAD and STL files, identify prohibited content, block certain prints, and receive regular updates as new files are cataloged. If a printer cannot reliably detect and block restricted designs, it would fail qualification and be banned from sale in the state.

Critics argue the bill goes beyond firearm regulation, potentially affecting hobbyists, engineers, designers, and small businesses who use 3D printers for lawful purposes. They also raise concerns about free speech implications, since digital design files are often considered protected expression.

AB 2047 is still in its early stages, but if passed, it would mark one of the most aggressive attempts yet to regulate 3D printing technology through state-level gun control policy.