Category: California

California has passed AB 2047, the California Firearm Printing Prevention Act, and the bill is now on Governor Gavin Newsom’s desk.
The measure, authored by Assembly Member Rebecca Bauer-Kahan, would eventually require consumer 3D printers sold or transferred in the state to include “firearm blocking technology” intended to identify and stop print jobs for firearms and certain illegal parts, including machine-gun conversion devices. After weeks of amendments, the Legislature sent the enrolled bill to the governor in the closing hours of the 2026 session. Newsom has until the end of September to sign or veto it.
The version that reached his desk is far narrower than the bill that first cleared the Assembly in May. The Senate stripped several of the most aggressive enforcement tools after lawmakers and industry groups argued they were technologically infeasible or overbroad. Gone are the original criminal misdemeanor for disabling the software, the $25,000-per-violation civil penalties, the mandatory manufacturer self-attestation process, and a public roster of “compliant” models.
The final text keeps an exemption for printers used exclusively to make entertainment-industry props and lets the California Department of Justice create additional exceptions by regulation. It also shields people who share digital firearm files solely to test or develop blocking software.
What remains is a delayed, contingent mandate. Beginning no later than July 1, 2027, the DOJ must check quarterly whether ASTM International has published industry standards for firearm-blocking technology on 3D printers. If ASTM issues qualifying standards, the department then has 24 months to publish its own written guidance or regulations describing minimum performance requirements. One year after those state standards appear, it would become unlawful to sell, offer for sale, or transfer a 3D printer in California that lacks compliant blocking technology. If ASTM has not published standards by July 1, 2029, the department is relieved of further duties under the act, and the sales restriction may never take effect.
The bill does not operate in a vacuum. California already prohibits unlicensed people from using a 3D printer or CNC mill to manufacture a firearm under Penal Code § 29185. Separate statutes restrict machines whose “sole or primary function” is to make guns and create civil liability for distributing “digital firearm manufacturing code” to unlicensed persons. AB 1263 and related 2025–26 measures further expanded definitions of firearm manufacturing machines and accessories effective January 1, 2026. AB 2047 tries to move one step upstream by making the printer itself refuse certain files.
California is not the first state down this path. New York enacted a similar blocking-technology law earlier this year. Sacramento modeled AB 2047 on that approach, then made the California version more conditional after the Senate rewrite.
Critics say the concept still fails on both technology and law. 3D-printing companies, the ACLU of California, Hollywood prop shops, the Electronic Frontier Foundation, and gun-rights groups argue that detection algorithms are easy to evade with slightly modified files, offline machines, older printers already in circulation, or out-of-state purchases. They also raise First Amendment concerns about treating design files as something the state can force hardware makers to censor, and they warn that unreliable software would burden schools, small businesses, and hobbyists. Several analyses noted that the Senate rewrite left the actual sales ban hanging on a private standards body that may never act.
Supporters, including Everytown for Gun Safety and the bill’s author, frame AB 2047 as a response to recovered 3D-printed guns and unfinished frames. They describe it as a way to cut off a pipeline for untraceable weapons before a file becomes a firearm.
Even if Newsom signs the bill, nothing changes at the store counter tomorrow. The mandate is years away, if it arrives at all. The practical fight now is whether ASTM writes a standard the state can adopt—and whether software that must inspect every print job can ever work well enough to survive both evasion and a courtroom.
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California still wants to regulate 3D printers because people can use them to make firearms without the state’s blessing. Its vehicle is AB 2047, a bill originally designed to force printer makers to build in technology capable of detecting and blocking gun files.
But after a round of amendments, the bill has been substantially watered down. What started as a mandate is now more of a regulatory tripwire — one that may never actually be triggered.
From Mandate to Maybe
Introduced in February by Assemblymember Rebecca Bauer-Kahan (D-Orinda), AB 2047 originally would have required 3D printers sold or transferred in California to include state-approved “firearm blocking technology” — hardware or software designed to prevent the machine from printing files identified as firearms or firearm components.
The amended version doesn’t actually establish that standard.
Instead, beginning no later than July 1, 2027, the California Department of Justice would check quarterly to see whether ASTM International — the private standards organization involved in additive manufacturing, the industry’s term for 3D printing — has published standards for firearm-blocking technology.
If ASTM does, DOJ gets 24 months to develop guidance or regulations based on those standards. Per the bill, those rules would establish “minimum performance standards” necessary to safely, fairly and effectively implement the technology statewide.
And if ASTM hasn’t published anything by July 1, 2029?
The bill says DOJ “shall not be required to make any further determinations under this section.”
In other words, no ASTM standards, no California regulations under AB 2047.
At least for now.
Passing the Buck
The amended bill flips the original structure on its head.
Instead of California lawmakers deciding what firearm-blocking technology must do, they wait for an outside standards organization to establish the technical foundation. If that happens, DOJ gets to turn it into regulations.
Politically, that’s convenient.
Lawmakers get to vote for “doing something about ghost guns” without having to explain how the technology is actually supposed to work. If the eventual regulations are expensive, ineffective or technologically impossible, DOJ owns the details.
The legislators simply created the machine and walked away.
Legislating by handing the hard decisions to unelected regulators is an interesting move for a political class that spends so much time warning everyone about threats to democracy.
There’s Another Problem: Does This Technology Even Work?
That’s the bigger question hanging over AB 2047.
The blocking software envisioned by proposals like this would somehow have to recognize firearm-related geometry while allowing the countless ordinary objects that contain identical or similar shapes.
A printer doesn’t inherently know whether a particular hole, tube, spring, cavity or other geometry is destined to become part of a firearm, a household object, a prototype or something else entirely.
Even the federal Justice Department has gone looking to the 3D-printing industry for help with the problem.
Then there’s the First Amendment.
The California Senate’s own committee analysis raised questions about restricting what a printer can produce and the unsettled issue of whether computer code constitutes protected speech. California is already fighting on similar ground in its lawsuit involving websites that distribute 3D gun files.
The Electronic Frontier Foundation has also blasted the proposal, arguing that it would effectively build censorship into the printer itself.
That’s what makes AB 2047 more interesting than another California “ghost gun” bill. The state isn’t merely trying to regulate what someone manufactures. It’s attempting to regulate what a general-purpose machine is allowed to process.
The Clock Is Running
AB 2047 cleared the Assembly in May and has since moved through the Senate Judiciary and Public Safety committees.
It now faces the Senate floor — and a deadline.
The Legislature has until August 31 to pass bills this session. If the Senate approves AB 2047 without further amendments, it heads to Gov. Gavin Newsom. If senators change it again, it goes back to the Assembly for concurrence.
That doesn’t leave much time.
Then again, this is California and we’re talking about gun control. Finding time has rarely been the problem.
The Bottom Line
On its face, the amendments look like a win for 3D-printer manufacturers, hobbyists and anyone else who doesn’t particularly like the idea of government-approved software deciding what their machine is allowed to print.
But this isn’t a clean escape.
California hasn’t abandoned firearm-blocking technology. It has outsourced the trigger.
If ASTM never produces the standards, AB 2047 could amount to little more than bureaucratic homework. If ASTM does, however, California DOJ already has the legislative framework it needs to start turning those standards into rules.
The bill deserves to die, teeth filed down or not. A law that outsources its technical trigger to a private standards organization and leaves the actual requirements to regulators is questionable lawmaking before we even get to whether the underlying technology works.
But this is California, in the closing days of the legislative session, with a super majority that rarely lets a gun-control bill expire quietly.
The smart bet isn’t that AB 2047 dies.
It’s that California passes the framework now and waits for someone else to pull the trigger.
Fresno mulls letting prosecutors carry concealed firearms after stabbing rocks California
Fresno County officials are pushing to let prosecutors carry concealed firearms after a shocking daylight stabbing of a senior deputy district attorney last week.
Supervisor Garry Bredefeld is working with Sheriff John Zanoni and DA Lisa Smittcamp on an ordinance allowing them to be armed on county property, according to Your Central Valley.
The proposal is expected to go before the Fresno County Board of Supervisors in the coming weeks.
“All of our law enforcement — whether they’re prosecutors, the sheriffs or the police officers — get up and work to make this community safe,” Bredefeld said. “The least we can do is make sure they have the means to protect themselves.”
The push comes after a senior deputy district attorney was stabbed three times in the back Thursday while outside Courthouse Park in Downtown Fresno.
Smittcamp questioned the county’s current restrictions Friday, noting that she is prohibited from carrying a firearm on county property despite her position.
“I am the chief law enforcement official in the county of Fresno … if I want to carry a weapon on county property I can’t under a current ordinance,” Smittcamp said. “Kind of ridiculous … people like Mr. Crawford are empowered by the weakness of the criminal justice system.”
Supervisors Nathan Magsig and Luis Chavez also backed the proposed change, according to the outlet, with Chavez calling it “long overdue.”
“I know for a fact that prosecutors have received death threats,” Chavez said. “We need to start recognizing our prosecutors as part of our public safety family.”
Magsig said the change would require the county to work with state officials. Bredefeld said he was not optimistic the attack would change lawmakers’ attitudes in Sacramento.
Dustin Crawford, 42, allegedly approached the prosecutor and others while they were outside Courthouse Park shooting a campaign commercial.
Crawford allegedly recognized the group before singling out the prosecutor and stabbing him three times in the back.

Five bad bills clear appropriations — now on to the floor
Now, five of those measures have, indeed, been passed in committee and are eligible for floor votes in the state Senate and Assembly.
According to a legislative update by the National Rifle Association’s Institute for Legislative Action, three bad Assembly bills were passed by the Senate Appropriations Committee and are now eligible for a vote on the Senate floor.
AB 1743 expands the database that leaked CCW holder data in 2022
Assembly Bill 1743 expands the state’s firearm owner data-sharing framework by increasing access to information maintained in California’s Automated Firearms System and related databases.
AB 1753 expands red flag laws under the guise of “clarification”
AB 1753 “clarifies” California’s Gun Violence Restraining Order (GVRO) violation framework by explicitly subjecting ammunition possession to the same hearing and enforcement procedures currently applied to firearms.
“Red flag laws have repeatedly stripped law-abiding citizens of their Second Amendment rights while undermining basic due process protections,” NRA-ILA wrote. “Existing red flag laws in California should not be expanded under the guise of ‘clarification,’ but repealed.”
AB 2047 goes after 3D printers — the same play as New York’s Hochul law
“The bill represents a broad attack on lawful technology and raises concerns about free speech, innovation and the rights of law-abiding Californians,” NRA-ILA reported. “These concerns are not just realized by firearm owners, but tens of thousands of STEM educators and technology professionals.”
Leo Grizzaffi is a lifelong hunter and veteran of many African safaris. Author and reloading expert, his specialty is the care and feeding of big bore double rifles, however he also dabbles with the little calibers. Leo resides in California, where being a lawyer and judge in the City of Los Angeles sometimes interferes with his busy hunting and reloading schedule.








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