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Stricter rules for undetectable firearms: Modernizing detection requirements.

This Act modernizes the Undetectable Firearms Act of 1988 regarding firearms that are difficult to detect by security scanners, such as those used in airports. It redefines 'detectable material' and 'major component' and explicitly includes firearm prototypes. The legislation mandates that firearms must contain sufficient magnetic material to be detected by standard screening devices.
Key points
Detectability Requirement: Firearms must contain material producing a magnetic field equivalent to at least 3.7 ounces of 17–4 PH stainless steel.
New Definition of 'Major Component': Includes the slide, cylinder, frame, or receiver, and for rifles/shotguns, the barrel.
Scope Expansion: The prohibition now explicitly includes firearm prototypes.
Exemptions: The rules do not apply to firearms possessed by or under the control of the U.S. government, or manufacturing/importation under existing government contracts.
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Additional Information
Print number: 117_HR_1477
Sponsor: Rep. Dean, Madeleine [D-PA-4]
Process start date: 2021-03-02
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Source data: api.congress.gov
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OFFICIAL LEGAL TITLE

Undetectable Firearms Modernization Act

FREQUENTLY ASKED QUESTIONS

What is the official ID of this bill?

The official print number for this legislation is 117_HR_1477.

Which chamber initiated this legislation?

This legislation was initiated in the House of Representatives.

When did the legislative process begin?

The process officially started on 2021-03-02.

What are the main provisions?

Key points include:

  • Detectability Requirement: Firearms must contain material producing a magnetic field equivalent to at least 3.7 ounces of 17–4 PH stainless steel.
  • New Definition of 'Major Component': Includes the slide, cylinder, frame, or receiver, and for rifles/shotguns, the barrel.
  • Scope Expansion: The prohibition now explicitly includes firearm prototypes.
  • Exemptions: The rules do not apply to firearms possessed by or under the control of the U.S. government, or manufacturing/importation under existing government contracts.
What is the specific legal status?

The current status is Expired.

Where can I read the full text of this legislation?

The full official text is available at: View full text

Who is the primary sponsor?

The primary sponsor is Rep. Dean, Madeleine [D-PA-4].

What is the latest detailed status?

The latest detailed status is: Referred to the Subcommittee on Crime, Terrorism, and Homeland Security.

Is this summary verified?

Yes. This content was analyzed by AI and verified by the Lustra Judge System on 2026-01-02.

CATEGORIES

Security Courts and Law