California Bill AB2047 Would Require Firearm-Blocking Tech in All 3D Printers

California has introduced a new bill that could fundamentally change how 3D printers are sold in the state. Assembly Bill 2047, also known as the California Firearm Printing Prevention Act, was introduced on February 17, 2026 by Assembly Member Bauer-Kahan.

What the Bill Proposes

If passed, AB2047 would require:

• DOJ Registration: 3D printer manufacturers would be required to register each printer model with the California Department of Justice for approval before sale in the state.
• Firearm Blocking Technology: All 3D printers sold in California must include technology capable of blocking the production of firearm parts.
• Penalties: Civil penalties of up to $25,000 per violation for selling or transferring non-compliant printers.
• Firmware Restrictions: It would be a misdemeanor to knowingly circumvent the protections by installing open-source software or modifications.

Industry Response

The proposed legislation is drawing criticism from the maker community and 3D printing industry. Critics argue that the technology to reliably detect and block firearm prints does not exist, such requirements would stifle innovation and limit consumer choice, and the bill targets general-purpose machines used primarily for legitimate hobbyist and industrial applications.

This legislation takes a proactive approach to public safety by ensuring that 3D printers sold in California include the technology to block the production of illegal firearms, Bauer-Kahan stated.

National Trend

California joins Washington and New York in proposing legislation to restrict 3D printer sales over firearm concerns. The bills represent an escalating legal offensive against ghost guns and undetectable firearms manufactured at home.

The bill is scheduled for committee review on March 20, 2026.