California has enacted a new law requiring 3D printer manufacturers to integrate technology that prevents the printing of firearms. The regulation applies exclusively to new devices sold or transferred within the state, meaning existing 3D printers are exempt from retrofitting requirements.
The implementation of this mandate depends on the publication of industry standards by ASTM International. The California Department of Justice is tasked with monitoring for these standards on a quarterly basis, starting no later than July 1, 2027, and continuing until July 1, 2029.
If no standard is adopted by the 2029 deadline, the Department of Justice will cease its monitoring efforts. The law does not impose a direct ban on non-compliant printers, focusing instead on the sale and transfer processes rather than the ownership or personal use of the equipment.
Technical challenges remain regarding the detection of firearm-related files. Current methods, such as database matching or model-based analysis, face criticism for potential inaccuracies and susceptibility to file modifications, as noted by the Electronic Frontier Foundation.
