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Fri, 9 Oct, 2026Updated 11:09 am IST
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California Bans 3D Gun Printing

New law requires manufacturers to add firearm prevention tech to certain printers, but exempts existing machines and won't take effect until technical standard is set

California Bans 3D Gun Printing
Photo: Oleg Bor / wikimedia (BY-SA)

California has enacted a law requiring 3D printer manufacturers to add firearm prevention technology to certain printers, making it the second US state to establish restrictions on firearm production through 3D printing equipment. The law, signed by Governor Gavin Newsom, does not immediately require companies to alter machines already sold or owned, and existing 3D printer owners in California will not be required to install new blocking hardware.

The law will only apply to future sales and transfers of 3D printers once a technical standard is established by ASTM. This means that manufacturers cannot comply fully with the law until this standard is set.

California joins New York as the second US state to establish such restrictions, while Colorado and Washington are pursuing comparable measures. The law's practical reach depends on technology capable of identifying potentially prohibited designs.

## What it means The new law is significant as it aims to prevent the production of firearms using 3D printing equipment. However, the exemption of existing machines and the delay in implementation until a technical standard is set may limit its immediate impact. The law will affect manufacturers who will have to ensure that their printers comply with the new requirements before they can be sold or transferred in California.

## Why it matters The law is part of a growing effort to regulate the use of 3D printing technology in the production of firearms. As 3D printing technology becomes more widespread, there are concerns about its potential use in producing unregulated firearms. The law in California, and similar measures in other states, aim to address these concerns and prevent the production of firearms that could potentially be used illegally.

The law will be closely watched by manufacturers, 3D printer owners, and law enforcement agencies, as it sets a precedent for the regulation of 3D printing technology in the US. As the technology continues to evolve, it is likely that we will see more laws and regulations aimed at preventing its misuse.

Sources

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