California already bars knowingly helping someone unlawfully manufacture firearms, including with a 3D printer. AB 2047 was signed September 26, 2026, and it adds no purchase rule now: it starts a Department of Justice review of whether industry standards exist for 3D-printer firearm blocking technology.
Sources checked October 12, 2026. Educational information only, not legal advice.
| What changed | The Governor approved AB 2047 on September 26, 2026; it was chaptered the same day as Chapter 461, Statutes of 2026. |
| Effective | Non-urgency act, effective January 1, 2027. No duty for printer buyers now; the first DOJ standards check is due no later than July 1, 2027. |
| Applies to | Sellers and manufacturers of 3D printers in California if DOJ later adopts standards-based rules; printer owners have no new step today. |
| Statutory basis | AB 2047, Chapter 461, Statutes of 2026; adds Title 21.1 (commencing with Section 3273.631) to Part 4 of Division 3 of the Civil Code. |
What happened
The official status record shows “Approved by the Governor” and “Chaptered by Secretary of State – Chapter 461, Statutes of 2026” on September 26, 2026. That resolves the gap CA2A flagged on September 10, when the bill was listed only as enrolled with no chaptering entry. It was one of ten firearms bills in the Governor’s September 26 package.
The bill text does not require anything of printer owners or buyers. It directs the Department of Justice to “check on a quarterly basis beginning no later than July 1, 2027” whether ASTM International has published or adopted industry standards for firearm blocking technology for 3-dimensional printers, and if so to publish written guidance or regulations within 24 months. The sales provisions open only “Commencing one year after the department has published written guidance or regulations” (proposed Section 3273.633(c)), and the required checks end if no standards appear by July 1, 2029.
What it means for you
Nothing changes for a California printer owner or buyer today: there is no blocking requirement, no registration step and no new fee. The dates that matter are DOJ’s first quarterly check, due no later than July 1, 2027, and any later guidance, because that guidance is what would start the clock on a purchase rule. The text exempts printers used exclusively to make entertainment props and allows further regulatory exceptions.
The official source
Read the primary sources rather than a summary of them, including this one.
- AB 2047: official status Governor’s approval and Chapter 461, Statutes of 2026 (September 26, 2026); non-urgency.
- AB 2047: bill text Quarterly standards checks, the 24-month guidance step and the sales trigger.
- AB 2047: official history Dated legislative actions and votes.
Discuss
Update log
- October 12, 2026Updated: the Governor approved and chaptered the bill on September 26, 2026; no purchase requirement applies today.
- September 10, 2026Published from the enrolled bill and official status/history records by CA2A Newsroom.
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