Date saved: 2026-10-21 03:00 (PDT)
Sources: Giffords Law Center, PCMag, The Register, Colorado Legislature, Washington Legislature, KOTA TV, Adafruit, Everytown
Key findings
State laws enacted in 2026
- Colorado HB 26-1144, signed by Gov. Jared Polis in May and effective July 1, prohibits manufacturing a firearm, unfinished frame or receiver, large-capacity magazine, or rapid-fire device with a 3D printer or CNC milling machine without a federal firearms license; it also criminalizes possessing or distributing digital instructions if "circumstances indicate intent" to manufacture or distribute unlawfully. (Source)
- Washington HB 2320, signed by Gov. Bob Ferguson in March and effective July 1, prohibits using 3D printers and CNC milling machines to manufacture certain firearms and machine-gun conversion devices, and restricts the distribution of digital firearm manufacturing code; it defines "digital firearm manufacturing code" as any CAD files or other code that may be used to program a 3D printer or CNC milling machine to manufacture a firearm, frame or receiver, magazine, or unlawful firearm part. (Source)
- New York's FY 2026-2027 executive budget bill (S.9005 / A.10005), signed in May, requires all 3D printers sold or delivered in New York to include "blocking technology", software or firmware that scans every print file through a "firearms blueprint detection algorithm" and refuses to print anything it flags as a potential firearm or component; it also criminalizes the intentional sale, distribution, or possession of digital instructions to illegally manufacture a firearm or component parts without a license, and requires the sale or transfer of any 3D printer to be done in-person. (Source)
- New Jersey previously banned 3D printing firearms without a license and also prohibited the possession of the digital code used to 3D print firearms with the intent to manufacture a firearm (AB 4975). (Source)
- Maine, Virginia, and additional states also enacted laws tightening rules around 3D-printed guns and firearms without serial numbers in 2026. (Source)
The CNC and subtractive manufacturing reach
- Colorado's law defines 3D printing as both additive AND subtractive manufacturing, meaning CNC machines, milling equipment, and router tables are legally "3D printers" under the statute; woodworkers, machinists, and engineers with no connection to firearms are pulled into a ghost gun manufacturing statute. (Source)
- New York's definition of "digital firearm manufacturing code" specifically includes "any machine capable of making three-dimensional modifications to an object from a digital design file using subtractive manufacturing", covering CNC mills alongside additive printers. (Source)
- California already prohibits using a 3D printer to make firearms, and is considering AB 2047, which would require blocking technology on 3D printers akin to New York's law; California's AB 1263 expands liability for those who facilitate or distribute digital firearm manufacturing code. (Source)
- California law requires any person, firm, or corporation to obtain a firearm manufacturer's license from the California Department of Justice to use a CNC milling machine to manufacture a firearm; it is unlawful to sell, offer to sell, or transfer a CNC milling machine or 3D printer that has the sole or primary function of manufacturing firearms to anyone without a federal license. (Source)
Federal dimension and industry response
- The 3D Printed Gun Safety Act was introduced in the U.S. House and Senate last June as part of federal efforts to address the issue. (Source)
- Adafruit warned that New York's blocking technology requirement would cover a broad set of manufacturing machinery, not just resin and FDM printers, but also CNC mills and any machine capable of making three-dimensional modifications to an object from a digital design file using subtractive manufacturing. (Source)
- The Washington Post reported in February that the ATF had updated its rules to close some loopholes in 2022, and that several states already make it illegal to distribute files that can be used to program a 3D printer to make a firearm, Delaware, New Jersey, and California among them. (Source)
The wave of state laws targeting 3D-printed guns is reaching far beyond the ghost gun problem it claims to solve (and the definitional creep is the story worth watching. Colorado's HB 26-1144 and Washington's HB 2320 both define 3D printing as including subtractive manufacturing, which means CNC milling machines, router tables, and by some readings even conventional woodworking equipment fall under statutes originally aimed at untraceable firearms. New York's budget bill requires that every 3D printer sold in the state include "blocking technology") firmware that scans every print file through a firearms blueprint detection algorithm and refuses to print anything flagged as a potential firearm or component. California is considering a similar mandate.
The throughline is a fundamental tension between two legitimate concerns. On one side, untraceable 3D-printed firearms are a real and growing problem for law enforcement, and the distribution of digital firearm manufacturing code is a genuine vector. On the other, a law that defines a CNC mill as a "3D printer" and requires all consumer printing hardware to include government-mandated content filtering opens a door that goes well beyond guns, it establishes a precedent for embedded surveillance and file-blocking in general-purpose manufacturing tools, with the state maintaining a database of banned files. The open-source firmware community (Klipper, Marlin, OrcaSlicer, PrusaSlicer) is directly in the crosshairs of the California proposal's compliance roster.
What to watch next: whether the federal NDAA FY2026 and HR 4143 proposals add a national layer to what is currently a state-by-state patchwork, and how the courts handle the First Amendment implications of criminalizing possession of digital firearm manufacturing code. The Adafruit and open-source hardware community response to New York's blocking technology mandate will be a leading indicator of how much practical resistance these laws face from the maker community.
Source links
- Giffords Law Center: Gun Law Trendwatch: How States Are Moving Forward in 2026
- PCMag: The Ghost Gun Crackdown Is Quietly Threatening the Future of 3D Printing
- The Register: Ghost gun legislation casts shadow over 3D printing
- KOTA Territory News: More states restrict 3D-printed firearms
- Giffords Law Center: Ghost Guns in California
- Washington State Legislature: HB 2320 Bill Report
- Ryan McBeth: This Law Makes YOU a Criminal, Even if You Don't Own a Gun (New York's 3D printer law explained)
- Planet 3DP: Your Favorite 3D Printer Is About to Become Illegal