Compliance center
The California Firearm Printing Prevention Act (AB 2047, Bauer-Kahan) would make firearm blocking technology a legal requirement for every 3D printer sold or transferred in California. Here's where the bill stands, what it demands, and when.
Legislative tracker
Updated July 17, 2026.
Compliance clock
As drafted in the amended bill.
Also in the bill
Disabling or circumventing the blocking system is a misdemeanor — the safeguards must resist bypass even by technically skilled users. That makes tamper resistance a certification axis, not a nice-to-have.
What the law requires
The statute defines it as hardware, firmware, or other integrated measures ensuring a printer will not proceed with any print job unless the file has been evaluated by a firearm-blueprint detection algorithm and determined safe. In practice, that means four capabilities:
Capability 01
No input path may skip evaluation — local, removable media, networked, or cloud-sliced. SENTINEL intercepts at the queue level, below every interface.
Capability 02
Algorithms must meet DOJ performance standards once published. SENTINEL's evaluation program is built around false-positive/false-negative benchmarking from day one.
Capability 03
A determination that a file would produce a firearm or illegal component must stop the print. SENTINEL enforces at the motion-planner boundary.
Capability 04
Integrated measures must hold up against skilled attempts to disable them. SENTINEL treats bypass attempts as tamper events with attestation-grade logging.
Beyond California
California is furthest along, but it isn't alone. New York, Washington, and Colorado are advancing parallel legislation targeting 3D-printed firearms — with California's framework the likely template. A manufacturer integrating a certified detection layer once is positioned for all of them.
The regulatory gap
In March 2025 the U.S. Supreme Court upheld the ATF's ghost-gun rule on weapon parts kits (Bondi v. VanDerStok) — but that rule does not reach 3D-printed firearms made at home. Recoveries of 3D-printed guns at crime scenes across 20 reporting cities grew from 32 in 2020 to 325 in 2024. Legislatures are responding at the only remaining chokepoint: the printer itself.
We work with manufacturers now so that certification day is a formality, not a fire drill.
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