Your next printer purchase might one day come with a new feature you never asked for. California Governor Gavin Newsom has signed a law that aims to bring firearm-blocking technology to 3D printers sold in the state, and the maker world is paying close attention.
Here is the short version. California is now the second US state, after New York, to pass this kind of measure. The idea is that new printers sold in the state would need built-in software or hardware checks meant to stop them from printing firearm parts. Printer makers and sellers would not be allowed to sell or transfer non-compliant new machines once the rules apply.
The important part for hobbyists is the timing. Nothing takes effect until ASTM International publishes or adopts a technical standard describing how such blocking should work. California's Department of Justice has to check for that standard every quarter, beginning by July 1, 2027, and that monitoring ends if no standard appears by July 1, 2029. So the law can sit quietly for a long time, or even forever, without changing anything on store shelves.
It also matters what the law does not do. Printers you already own are exempt, there is no retrofit mandate, and the rules cover selling and transferring machines, not owning or running one. Critics in the community have pushed back on a state agency shaping how commercial printers work. Policy expert Michael Weinberg has pointed out that many desktop printers come from open-source hardware with modifiable firmware, which makes software-based blocking hard to enforce.
How to keep up without the stress
You do not need to do anything today. If you are shopping for a new printer, check the maker's firmware update notes and release announcements, since that is where any new compliance features would first appear. Keep a backup of your slicer profiles and printer settings, and make a habit of reading changelogs before you update firmware. If you build or mod printers, follow ASTM announcements, because the standard will decide what the rules mean in practice.
Try it on your printer
Policy headlines are a good reminder that your printer is a tool for making useful, fun things. Pick a practical print this weekend, like a cable organizer or a headphone hook, and browse beginner-friendly models and supplies at flarelab.com.
Frequently asked questions
Do I have to give up my current 3D printer?
No. Reporting on the law says existing printers are exempt, there is no retrofit requirement, and the rules cover selling or transferring new printers, not owning or using one.
When does the law actually take effect?
Not yet. Nothing applies until ASTM International publishes or adopts a relevant technical standard. California's Department of Justice must check for one every quarter, starting by July 1, 2027, and that duty ends if no standard exists by July 1, 2029.
Is California the first state to do this?
No. California is described as the second US state, after New York, to pass a measure requiring firearm-blocking technology in 3D printers sold there.
Will this change how I print everyday things like brackets and toys?
For normal hobby printing, you should not notice anything today. The rules are aimed at what manufacturers and sellers build into new printers, and the details will depend on a standard that does not exist yet.
Inspired by reporting from 3D Printing Industry. Rewritten by the Flarelab team.
