Bauer-Kahan introduces bill requiring DOJ-certified firearm blueprint detection in 3D printers

Assemblymember Rebecca Bauer-Kahan introduced Assembly Bill No. 2047, the California Firearm Printing Prevention Act, on February 19, 2026, proposing that any 3D printer sold or transferred in California be equipped with DOJ-certified "firearm blueprint detection." The provision names the feature explicitly and ties certification to the DOJ, which makes the bill immediately relevant to manufacturers, retailers, and private sellers who move printers across California state lines.

AB 2047's core technical requirement centers on the DOJ-certified detection capability. The bill does not leave the feature as optional for purchasers; it connects the certification to the act of sale or transfer, which means new transactions inside California would be covered. That construction puts compliance responsibility on whoever sells or transfers a machine in the state rather than only on end users after purchase.

For vendors and manufacturers this has clear supply-chain implications. A 3D printer shipped into California without the specified DOJ-certified detection functionality would, under AB 2047's language, no longer meet the criteria for lawful sale or transfer inside the state. Retailers who list printers for sale in California and individuals who sell used machines in private transactions will face the same statutory trigger around the presence of the DOJ-certified feature.

The proposal raises immediate questions for the 3D printing ecosystem about how "firearm blueprint detection" will be implemented in hardware, firmware, and host software. Because AB 2047 ties the requirement to DOJ certification, companies that supply commercial printers, aftermarket controllers, or embedded interfaces will need a path to obtain that certification if they want to continue selling into California. That linkage suggests manufacturers will need to start conversations with certification bodies and adjust product roadmaps to include the mandated detection layer.

AB 2047 was introduced as a legislative measure on February 19, 2026; Rebecca Bauer-Kahan attached the title California Firearm Printing Prevention Act to the bill file. If the assembly moves the bill forward, the statutory requirement that 3D printers sold or transferred in California carry DOJ-certified "firearm blueprint detection" will become a compliance and design constraint that affects sales channels, aftermarket modification practices, and the secondhand market across the state.