Date saved: 2026-10-18 14:33 (PDT)
Sources: CA DOJ, Washington State Legislature, Giffords Law Center, PCMag, NY law firm alerts, Colorado Legislature
Scope
Laws targeting 3D printers, CNC milling machines, lathes, and digital manufacturing code, overwhelmingly focused on firearm ("ghost gun") production, but with growing reach into the machines and files themselves.
Federal / general
- Federal law: unlicensed manufacture of firearms (incl. by 3D printer or CNC) illegal; undetectable firearms act applies. Frames/receivers (incl. unfinished) must be serialized by licensed manufacturers. "Digital firearm manufacturing code" = CAD files/instructions that program a 3D printer or CNC machine to make firearms/parts.
State laws
California
- Penal Code §29185: No person other than a state-licensed firearms manufacturer may use a CNC machine or 3D printer to manufacture a firearm; unlawful to sell/transfer/possess a CNC milling machine or 3D printer whose sole or primary function is manufacturing firearms (effective June 30, 2022 for CNC).
- License required to manufacture 3+ firearms/year, or any number via 3D printer.
- AB 1263 + SB 704 (effective Jan 1, 2026): Update definitions of "firearm accessory" and "firearm manufacturing machine" under the Firearm Industry Responsibility Act; new standards for sale of firearm barrels.
- Effective Jan 1, 2026: Expanded criminal and civil liability for facilitating unlawful firearm manufacture, sharing/distributing digital manufacturing files to unlicensed individuals; aiding/abetting use of CNC machines or 3D printers.
- AB 2047 (proposed, 2026): Would mandate 3D printers sold in CA embed technology to detect and block printing of firearm components.
- 2025 updates strengthened rules on distribution of digital firearm manufacturing code.
Washington State, HB 2320 (2025-26)
- Prohibits manufacturing certain firearms/components via 3D printer or CNC milling machine.
- Bans manufacture of untraceable firearms (with or without intent to sell).
- Bans knowing/reckless manufacture of frames/receivers (finished or unfinished) by 3D printer/CNC unless federally licensed.
- Bans sale/transfer/distribution of "digital firearm manufacturing code" to unlicensed persons; bans possessing such code with intent to distribute or to manufacture.
- Covers machine guns, bump-fire stocks, undetectable firearms, SBRs/shotguns made by any means incl. 3D/CNC.
New York, 2026 proposals (Hochul State of the State)
- Would require all 3D printers sold in NY to include software safeguards blocking production of firearms/components.
- Criminalize intentional distribution/possession of digital files used to 3D-print firearms or key components (incl. auto sears).
- Elevate 3D-printed firearm/component manufacturing to felony offenses, even if no completed firearm results.
- Minimum safety standards for 3D printer manufacturers selling into NY.
Colorado, HB26-1144 (2026)
- Prohibits 3D printing of firearm frames and receivers; criminalizes manufacturing certain firearms and parts via 3D printing. Passed House Judiciary Feb 2026; awaiting/pending governor action as of report date.
Industry pushback
- PCMag: Critics argue these laws reach "something much bigger: innovation", regulating upstream digital files and explicitly folding 3D printers and CNC machines into firearms law. Printer-mandated gun-detection software in CA/NY proposals is seen as a precedent for scanning/blocking any regulated object. (Source)
Key takeaways
1. Trend: from regulating the firearm → to regulating the machine (3D printers, CNC) → to regulating the digital file/code.
2. "Firearm manufacturing machine" is now a defined legal category (CA) covering 3D printers and CNC mills marketed/intended for gun production.
3. Mandatory printer-level content filtering (CA AB 2047, NY Hochul proposal) would be the first peacetime US mandate for consumer machines to block specific outputs.
4. Lathes/subtractive manufacturing generally remain unregulated except where machines meet the "sole or primary function" firearm-manufacturing test or are used to make regulated firearms.
Source links
- California DOJ: Information Bulletin 2025-DLE-18 (Ghost Guns, AB 1263 / SB 704)
- Washington State Legislature: HB 2320 report (3D printers, CNC milling machines, digital firearm code)
- Giffords Law Center: Ghost Guns in California
- CA Senate Public Safety: AB 2047 analysis
- Law alert: New York proposes sweeping regulations of 3D printers, ghost guns, and printed firearm components
- PCMag: The Government's Ghost Gun Battle Is Taking Aim at Something Much Bigger: Innovation
- Colorado Legislature: HB26-1144 summary