On August 13, 2026, California's Senate Appropriations Committee voted 5 to 2 to advance AB 2047, the bill that would require every new 3D printer sold in the state to ship with built-in "firearm blocking technology." That was the bill's last committee stop. It now heads to a full Senate floor vote, and the clock is loud: August 31 is the final day for passage in this legislative session. In other words, within about two weeks we will know whether the largest state economy in the country is going to regulate what a consumer 3D printer is allowed to print.
At DC Additive Pros we run printers every day for customers in Maryland and across the US, so we have been watching this one closely. Here is what the bill actually says, what it does not say, and what it means whether you own a printer or just buy printed parts.
What AB 2047 actually requires
The bill, formally titled "Firearms: 3-dimensional printing blocking technology," would prohibit the sale or transfer of 3D printers in California unless they include software that detects and refuses to print known firearm blueprint designs. The rollout is staged over several years. By September 1, 2028, the California Department of Justice must publish performance standards for the detection algorithms. Manufacturers must submit attestations to the DOJ by March 1, 2029, confirming their printers carry the technology, and the DOJ will maintain a public list of compliant models. Beginning December 1, 2029, selling or transferring a non-compliant printer in California becomes illegal, with exemptions carved out for certain industries and law enforcement.
The bill has been moving steadily: it passed the Assembly on May 27, cleared Senate Judiciary 11 to 2 on June 23, passed Public Safety 5 to 1 on June 30, and now Appropriations on August 13.
I live in California. Is my 3D printer about to become illegal?
No. AB 2047 restricts the sale and transfer of new non-compliant 3D printers starting December 1, 2029, and it does not ban printers you already own. If the bill becomes law, the machine on your bench today keeps printing exactly as it does now. The practical change arrives years out, when you go to buy your next printer in California and the retailer can only sell models on the DOJ's compliant list. What that compliant list looks like depends entirely on performance standards that will not even be published until late 2028.
Why the industry is pushing back
Supporters frame the bill as a response to untraceable, homemade firearms, and California legislators are not alone: lawmakers in Washington and New York have pursued similar measures. Opponents raise two main concerns. The Electronic Frontier Foundation argues that requiring a government-specified detection algorithm inside a general-purpose manufacturing tool sets a troubling precedent for digital freedom. And many in the maker community point at the engineering problem: a geometry-matching algorithm has to somehow distinguish a regulated part from the millions of ordinary brackets, housings, and fittings people print every day, without false-flagging legitimate work. How the DOJ writes those performance standards will decide whether compliance is a minor firmware update or a real burden on manufacturers, schools, and small print shops.
I just need a part printed. Can I skip the printer question entirely?
Yes. If you order custom parts from an established US print shop, printer compliance rules are our problem, not yours. Commercial service providers fall on the professional side of this kind of regulation, and nothing in AB 2047 changes how a customer uploads a file and receives a finished part. If you have a bracket, enclosure, fixture, or replacement part you need made, you can send it through our Build and Ship service and we will print it in the material the job calls for and ship it from our shop in Rockville, Maryland. No printer purchase, no firmware questions, no waiting to see what Sacramento does.
What happens between now and August 31
The Senate floor vote is the last real hurdle. If the Senate passes the amended bill, it goes back to the Assembly for concurrence and then to the governor's desk. If the calendar runs out, the bill dies for this session and would need to be reintroduced. Either way, the direction of travel is clear: multiple states now see consumer 3D printers as something to regulate, and manufacturers selling into the US market are going to be designing around that reality. We will cover the floor vote when it happens.
Questions about a part you need printed, or about how any of this affects a project? Email us at info@dcadditivepros.com.
Frequently asked questions
What does California's AB 2047 actually require?
AB 2047 would require new 3D printers sold in California to include software that detects and blocks the printing of known firearm blueprint designs. The California DOJ would publish performance standards by September 1, 2028, and maintain a public list of compliant printer models.
When would AB 2047 take effect if it passes?
The sales restriction would begin December 1, 2029. Before that, the DOJ must publish standards by September 1, 2028, and manufacturers must file attestations by March 1, 2029. Printers already owned are not affected.
Are other states passing 3D printer laws?
Yes, lawmakers in Washington and New York have pursued similar 3D printer legislation. California's AB 2047 is the furthest along, sitting one floor vote from final passage as of August 15, 2026.
Will this affect ordering custom 3D printed parts from a service?
No. AB 2047 regulates the sale of printers, not the ordering of printed parts from a professional service. Customers can still upload a design to a US print shop and receive finished parts with no change.
This article is for general information only and is not legal advice. All third party names, including the State of California, the California Department of Justice, and the Electronic Frontier Foundation, are used for identification only. DC Additive Pros is not affiliated with, endorsed by, or sponsored by any organization mentioned.