A first-of-its-kind law in New York could force 3D printers sold for homes and businesses to come equipped with technology blocking them from manufacturing firearms, marking a new approach to regulating "ghost guns" that have proliferated in crimes nationwide. The legislation targets the equipment used to produce untraceable weapons rather than the individuals who make them.
The law, signed last month by New York Governor Kathy Hochul, directs panels of experts to develop standards for firearm blueprint detection algorithms. A similar bill is under consideration in California. Both measures would require printers to analyze every design submitted for printing, compare it against a digital library of firearm parts, and reject those that are similar. The mandate would not take effect until 2029 at the earliest.
What the Right Is Saying
Gun rights advocates and some technology experts argue the legislation will prove ineffective and could infringe on constitutional rights. John Commerston, executive director of the NRA Institute for Legislative Action, defended homemade firearms as part of American tradition.
"Despite desperate fear-mongering campaigns, homemade firearms are nothing new — they are a proud, time-honored American tradition dating back to the founding of our Republic," Commerston said in a statement. He added that "these measures only restrict responsible Americans — who do follow the law — from participating in constitutionally protected activities."
The Association of 3D Printing supports the legislation but questions its practicality. Bill Decker, executive chairman of the group, said the technology faces fundamental limitations.
"It's not going to work," Decker said. "It's more of a political statement than anything else." He argued that criminals will find ways to circumvent detection by altering designs or taking their printing projects elsewhere.
Rory Mir, director of open access and technology community engagement at the Electronic Frontier Foundation, raised additional concerns about overblocking and privacy risks.
"These sort of censorship algorithms don't work, and they wind up capturing and blocking a lot of lawful speech," Mir said. Some harmless items like pipes or wall hangers could resemble firearm parts, leading to false positives, he noted. If print instructions are submitted for cloud-based AI searches, the system also risks exposing proprietary designs.
What the Left Is Saying
Gun safety advocates say 3D printers have created a new pathway for people who cannot legally purchase firearms—including children or convicted felons—to obtain them. Samuel Levy, director of policy advocacy at Everytown for Gun Safety, said the technology represents an important frontier in addressing ghost guns.
"3D printing really is the new frontier of the fight against ghost guns," Levy said. He argued that blocking actual 3D printing of firearms could make it harder for people to circumvent existing laws prohibiting unserialized weapons.
Eleven states already generally prohibit 3D-printed guns, and six additional states require them to receive serial numbers, according to Everytown for Gun Safety. Supporters say targeting the printers themselves addresses a gap that individual bans have not fully closed.
"These measures only restrict responsible Americans — who do follow the law — from participating in constitutionally protected activities."
What the Numbers Show
The number of privately made guns recovered in crimes and submitted to federal authorities rose from approximately 1,600 in 2017 to nearly 27,500 in 2023, according to a U.S. Department of Justice report released last year. The figures include all ghost guns, not just those produced with 3D printers.
Since 2012, the number of 3D printers worldwide has grown from an estimated 30,000 to over 3 million, while industry annual revenue has expanded from approximately $2 billion to $26 billion, according to Bill Decker of the Association of 3D Printing. Some consumer-grade printers now retail for several hundred dollars.
About one-third of U.S. states have already taken steps to ban or regulate build-it-yourself firearms that lack serial numbers and evade background check requirements. New York and California represent two of the nation's most populous states considering equipment-level mandates.
In a high-profile case, police said a 3D-printed gun likely was used in the killing of UnitedHealthcare CEO Brian Thompson in December 2024.
The Bottom Line
The New York law represents a novel regulatory approach that could set industry standards if it proves workable. The 2029 implementation deadline gives technology developers time to refine detection algorithms, though experts acknowledge significant challenges remain in distinguishing firearm components from similar-looking objects.
California's parallel effort means the outcome could be influenced by whichever state develops viable standards first. Gun safety advocates view this as a potential model for Democratic-led states seeking additional regulatory tools beyond bans on specific weapon types.
Critics say criminals determined to produce ghost guns will find workarounds, while technology experts question whether geometric analysis can accurately identify modified designs or novel approaches to firearm construction. The expert panels assigned to develop standards must balance efficacy against risks of overblocking lawful uses and potential privacy concerns from cloud-based scanning.