New York 3D printer blocking technology mandate

New York's 3D printer blocking technology mandate is a state law that, once its rules are written, will prohibit the sale or delivery of any 3D printer in New York unless the machine is equipped with blocking technology that refuses to run a print job until the file has been checked by a firearms-blueprint detection algorithm against a state-maintained library of gun blueprints. The provision was enacted as Part C of the FY2026-2027 budget bill S. 9005-C / A. 10005-C, signed by Governor Kathy Hochul on May 27, 2026. The device-sales requirement is not yet in force: it takes effect one year after the Division of Criminal Justice Services promulgates performance standards, which cannot happen until an expert working group reports, and a feasibility clause lets the working group defer the mandate if it finds the scanning technology is not technologically feasible.

Background

The law responds to firearms that can be produced from digital design files on consumer additive-manufacturing hardware, including untraceable ghost guns and pistol-conversion devices that turn a semi-automatic handgun into a machine gun. Governor Hochul's office presented the budget measures as a response to illegal 3D-printed ghost guns and do-it-yourself machine guns, pairing the 3D-printer rules with new criminal penalties for digital gun files. The gun-safety group Everytown for Gun Safety characterized the package as shutting down what it called the "plastic pipeline" of do-it-yourself firearms.

Rather than moving as a standalone firearms bill with its own floor debate, the measure was enacted inside the Public Protection and General Government article of the state budget, as Part C of S. 9005-C / A. 10005-C. Part C is split into Subpart A, which adds the criminal-law definitions and file offenses, and Subpart B, which creates the working group and file library in Executive Law § 837-aa and the device-sales requirement in General Business Law § 396-eeee. The National Rifle Association's Institute for Legislative Action objected to the use of the budget as the vehicle, calling it a "strategic move to put divisive legislation into an all-or-nothing budget bill" rather than passing the measure as a standalone bill subject to its own debate.

What the law requires

The operative command sits in the new General Business Law § 396-eeee (1):

No person, firm, partnership, association, or corporation shall sell or deliver any three-dimensional printer in the state of New York unless such printer is equipped with blocking technology.

Executive Law § 837-aa (1)(b) defines that blocking technology as hardware, software, firmware, or other integrated measures that keep a printer from running any print job "unless the underlying three-dimensional printing file has been evaluated by a firearms blueprint detection algorithm and determined not to be a printing file that would produce a firearm or illegal firearm parts." The detection algorithm itself is defined in § 837-aa (1)(c) as a software service that evaluates printing files, "whether in the form of stereolithography (STL) files or other computer aided design files or geometric code," and flags any file that could produce a firearm or illegal firearm parts.

To supply the data those algorithms check against, § 837-aa (3)(b) authorizes the Division of Criminal Justice Services to build and maintain a library of firearms blueprint files and illegal-firearm-parts blueprint files, "including scans of seized firearms." The statute directs that the library be made available to printer manufacturers, software-development vendors, and experts in computational design or public safety, for building and improving the blocking technology and detection algorithms.

The device requirement carries a narrow exception. Under § 396-eeee (5), the blocking-technology mandate does not apply to a sale or delivery to a buyer who holds both a New York gunsmith license under Penal Law § 400.00 and a federal firearms license, but only after that buyer submits a written request to the Attorney General and the Attorney General verifies the licenses and issues written authorization. Enforcement is civil and runs through the Attorney General: a gun-industry member who violates § 396-eeee is liable to the people of New York for a flat civil penalty of $5,000 for each qualified product unlawfully sold, transferred, imported, distributed, manufactured, marketed, or offered for sale, and the Attorney General may also sue to enjoin violations and obtain restitution.

Implementation timeline

The signing on May 27, 2026 did not switch on the device requirement. The § 837-aa working group and file-library provisions took effect on enactment, but the § 396-eeee sales prohibition is gated behind a chain of contingent steps and will not bind printer sellers for years.

Under § 837-aa (2), within 90 days of the section's effective date the Division of Criminal Justice Services, the Department of State, and the State University of New York will convene a working group of experts in additive-manufacturing technology, artificial intelligence and digital security, firearms regulation, public safety, and consumer product safety. No later than one year after it convenes, the working group is to recommend minimum safety standards for blocking technology. The Division then has, under § 837-aa (3)(a), up to nine months after receiving those recommendations to promulgate performance-standard rules. Subpart B's effective-date clause provides that the § 396-eeee sales requirement takes effect one year after those rules are promulgated. Stacked end to end, those statutory intervals place the earliest possible effective date for the device-sales requirement more than two years after enactment.

That chain can also stop entirely. The statute carries a feasibility escape hatch in § 837-aa (2):

[I]f the working group determines that it is not technologically feasible to require three-dimensional printers sold in the state of New York to include blocking technology, the working group shall so report, and no regulations shall be required to be promulgated pursuant to this section, until such time as the working group determines that it is technologically feasible.

If the working group makes that finding, no rules issue and the sales requirement never takes effect, deferred indefinitely until a future finding of feasibility.

Scope and definitions

The reach of the mandate turns on how broadly the statute defines a 3D printer. Penal Law § 265.00 (38), mirrored in Executive Law § 837-aa (1)(a), defines the term in two prongs:

"Three-dimensional printer" means: (a) any machine capable of rendering a three-dimensional object from a digital design file using additive manufacturing; or (b) any machine capable of making three-dimensional modifications to an object from a digital design file using subtractive manufacturing.

The statute does not separately define "additive manufacturing," "subtractive manufacturing," or a CNC machine, and it contains no carve-out for machine size, intended purpose, or consumer use. Writing in Techdirt, Karl Bode argued that the law as drafted would reach open-source printer firmware projects such as Marlin, Klipper, and RepRap, offline office printers with no network connection, and CNC milling equipment.

Under the statute, the minimum performance standards for blocking technology are left to the working group and the rules that follow, rather than written into the law itself.

Criminal provisions

Subpart A adds new digital-file offenses to the Penal Law, alongside a new definition of "digital firearm manufacturing code" in § 265.00 (39) covering computer-aided design files or other code that can program a 3D printer or CNC milling machine to produce a firearm, ghost gun, unfinished frame or receiver, silencer, rapid-fire modification device, or major firearm component.

Penal Law § 265.10 (11) makes it a class A misdemeanor to knowingly sell or distribute digital firearm manufacturing code to a person who lacks both a New York gunsmith license and a federal firearms license, subject to good-faith, out-of-state, and licensed-recipient exceptions stated in the text. Section 265.10 (12) makes it a class A misdemeanor to possess such code with intent to illegally manufacture a firearm or to distribute the code to a prohibited or unlicensed New York person. Both file offenses are misdemeanors, not felonies; the enacted text caps them at a class A misdemeanor.

The one felony in Subpart A targets conversion devices rather than printers or files. Under § 265.10 (10), a dealer or gunsmith who, on or after May 31, 2027, sells, transfers, or ships a "convertible pistol", which the statute defines as a semi-automatic pistol with a cruciform trigger bar that can be converted into a machine gun by attaching a pistol converter, commits a class D felony.

Technical feasibility criticism

The central technical objection is that no detection algorithm can reliably separate gun-part geometry from ordinary mechanical geometry. Phillip Torrone of Adafruit, whose critique Techdirt reproduced, argued that such a system would have to identify every possible firearm component from raw STL and G-code files without flagging the pipes, tubes, blocks, brackets, gears, and other common shapes that share geometric properties with gun parts, which he framed as a classification problem carrying high false-positive and false-negative rates.

Slicing software converts a 3D model into machine instructions (G-code) that describe tool paths, not labeled parts, so the file a printer executes does not announce what object it builds. Furthermore, additive 3D manufacturing typically involves the use of additional temporary material such as support material and brims, which further complicates detection. Prints can be oriented in a variety of ways, which will cause the slicer to generate entirely different G-code. Many machines also run offline, and much of the firmware that drives consumer printers is open source, which means a scanning requirement cannot be enforced on a printer that never contacts the state library or that runs community firmware the mandate does not reach. The Electronic Frontier Foundation summarized the technical bet as "an unfeasible tech solution."

Consumer-rights and surveillance concerns

The consumer-rights objection is that the mandate puts a state-defined filter between owners and hardware they bought. The Electronic Frontier Foundation described print-blocking as "censorware," software that it said "surveils every print," and framed the requirement as surveillance of lawful printing carried out on the owner's own machine.

A blocking-technology requirement is a manufacturer-side technical control fixed to hardware the buyer already owns. The Electronic Frontier Foundation has framed print blocking as anti-consumer for the same reason, treating a mandated filter on an owner's machine as a restriction on lawful use of property. The group compared the requirement to DRM, calling manufacturer-provided software restrictions "an old tactic from the DRM playbook" and tracing the approach to the Digital Millennium Copyright Act, which it said made bypassing DRM a federal crime. Techdirt noted that much of the firmware running consumer printers, including open-source projects such as Marlin, Klipper, and RepRap, would not ship with a state-compliant detection algorithm, so a scanning requirement could push owners toward proprietary, locked-down machines.

Furthermore, if someone encounters a false positive, the law does not outline any remediation or exemption procedure. The law does not even acknowledge nor even contain the term "false positive". Even if an algorithm is developed which has sufficiently low error rates on currently-available models, the error rate will generally increase once people start intentionally trying to find ways around it. This is known as an "Adversarial Example" and is a well-documented way to evade or deliberately confuse machine learning algorithms.

Comparison to other states

New York's measure is one of several state efforts in 2026 to regulate 3D-printed firearms through the printer rather than only the file. Washington's House Bill 2321, titled "Requiring three-dimensional printers be equipped with certain blocking technologies," would require printers sold in the state to carry blocking features tied to a firearms blueprint detection algorithm. The bill was prefiled on January 8, 2026 and referred to the House Civil Rights & Judiciary Committee, where it remained as of June 1, 2026; it has not been enacted. As reported by Tom's Hardware, the bill would prohibit sales after July 1, 2027 and set penalties as a class C felony carrying up to five years in prison and a $15,000 fine.

California's Assembly Bill 2047, authored by Assemblymember Rebecca Bauer-Kahan, would require 3D printers sold in the state to be equipped with firearm blocking technology and would add Penal Code § 29187 to make it a misdemeanor to knowingly disable, deactivate, uninstall, or otherwise circumvent firearm blocking technology installed in a 3D printer with intent to manufacture firearms. The Assembly passed the bill, last amended on May 18, 2026, and sent it to the state Senate, where it was pending as of June 1, 2026.

The underlying question of whether firearm code is protected speech has been litigated separately. In February 2026, the Third Circuit affirmed the dismissal of a challenge by Defense Distributed and the Second Amendment Foundation to New Jersey's restrictions on distributing 3D-printed gun code, holding that purely functional code with no expressive use is not protected speech and affirming dismissal because the plaintiffs had not pleaded that their files were expressive.

Reactions

On the gun-safety side, the Governor's office presented the law as setting "first-in-the-nation minimum safety standards for 3D printers sold in New York to be equipped with basic technology that prevents the unlicensed, illegal production of lethal firearms and firearm parts," and directed the Division of Criminal Justice Services to lead the expert task force. Everytown for Gun Safety praised the budget as nation-leading action against do-it-yourself machine guns and 3D-printed firearms.

On the maker and digital-rights side, the Electronic Frontier Foundation campaigned against the proposal under the banner "Stop New York's Attack on 3D Printing," arguing the approach burdens lawful makers and rests on technology that does not exist. Technical writers at Techdirt, drawing on analysis from the open-source hardware company Adafruit, focused on the classification problem and the breadth of the printer definition rather than the policy goal, arguing the text as written reaches far beyond firearms and is unworkable as a scanning mandate.

See also

• Right to Repair
• Digital rights management
• Digital Millennium Copyright Act
• Planned obsolescence
• Bambu Lab