AB 2047: Firearms: 3-dimensional printing blocking technology.

Official summary

Legislative Counsel’s Digest (official, as of the latest version). Written by nonpartisan legislative staff; reproduced verbatim.

Existing law makes it a crime to knowingly or willfully cause another person to engage in the unlawful manufacture of firearms or knowingly or willfully aiding, abetting, prompting, or facilitating the unlawful manufacture of firearms, including the manufacture of assault weapons or .50 BMG rifles or the manufacture of any firearm using a 3-dimensional printer, as specified.

Existing law authorizes a civil action against a person who knowingly distributes or causes to be distributed any digital firearm manufacturing code to any person, except as specified. Existing law authorizes the Attorney General, county counsel, or city attorney to bring an action against this person and seek a civil penalty, as specified, for each violation, as well as injunctive relief.

This bill would require the Department of Justice to check on a quarterly basis beginning no later than July 1, 2027, whether ASTM International has published industry standards for equipping 3-dimensional printers with firearm blocking technology. The bill would require, if the department determines that ASTM International has published or adopted industry standards for firearm blocking technology for 3-dimensional printers, that the department publish written guidance or regulations within 24 months after making that determination. The bill would require, among other things, the written guidance or regulations to describe minimum performance standards for 3-dimensional printer firearm blocking technology before a printer can lawfully be sold or offered for sale in the state. If, as of July 1, 2029, the department determines that ASTM International has not published industry standards for firearm blocking technology for 3-dimensional printers, the bill would relieve the department of any further responsibility to ascertain whether ASTM International has published or adopted industry standards. The bill would make it unlawful to sell, offer for sale, or transfer for consideration, a 3-dimensional printer in the State of California that is not equipped with firearm blocking technology that also meets the above-described industry standards. The bill would exempt printers used exclusively for the manufacturing of properties (props) in the entertainment industry, and would authorize the department to adopt regulations that provide for additional exceptions to these provisions.

This bill would also exempt a person who distributes, or causes the distribution of, digital firearm manufacturing code, solely for the bona fide purpose of, among other things, developing, refining, and testing the functionality of a firearm blocking technology from civil liability.

This bill would make these provisions severable.

Sponsors

Sponsors by party (alphabetical): Democratic 5

“Support” is shown only as formal sponsorship recorded by the legislature. Roll-call votes are available on the official bill page.

Recent official actions

1. September 26, 2026Chaptered by Secretary of State - Chapter 461, Statutes of 2026.
2. September 26, 2026Approved by the Governor.
3. September 14, 2026Enrolled and presented to the Governor at 1:30 p.m.
4. August 31, 2026Senate amendments concurred in. To Engrossing and Enrolling. (Ayes 60. Noes 18. Page 7035.).
5. August 31, 2026In Assembly. Concurrence in Senate amendments pending.
6. August 31, 2026Read third time. Passed. Ordered to the Assembly. (Ayes 29. Noes 10.).
7. August 30, 2026Read second time. Ordered to third reading.
8. August 28, 2026Read third time and amended. Ordered to second reading.
9. August 18, 2026Read second time. Ordered to third reading.
10. August 17, 2026Read second time and amended. Ordered returned to second reading.
11. August 17, 2026From committee: Amend, and do pass as amended. (Ayes 5. Noes 2.) (August 13).
12. August 3, 2026In committee: Referred to APPR. suspense file.