HR4221Referred to Committee

Undetectable Firearms Modernization Act

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Introduced
In Committee
3
Passed One Chamber
4
Passed Both
5
Signed into Law
119th
Congress
2025-06-27
Introduced
0
Cosponsors
HR
ⓘ
Type

Sponsor

Madeleine Dean
Madeleine Dean
Democrat · PA · Representative
Votes with party: 99.6% (544 recorded votes)

Full profile: /officials/D000631

Source: Congress.gov · FEC

Cosponsors (0)

Members who have signed on to support this bill since introduction. Source: Congress.gov.

No cosponsors on record. Bills can pass without cosponsors — this often means the sponsor introduced the bill alone, either because it's a messaging bill, a chairman's mark, or simply early in the legislative cycle.

Latest Action

The most recent step in the bill's legislative path. Committee Activity below shows referrals and reports; the full action-by-action history including floor proceedings lives at Congress.gov →

Referred to the House Committee on the Judiciary.

2025-06-27

Source: Congress.gov

Plain-English Summary

Undetectable Firearms Modernization Act This bill strengthens the detectability standard for firearms under federal firearms laws. Current law requires firearms to be detectable by walk-through metal detectors after the removal of grips, stocks, and magazines. Specifically, firearms must be as detectable as a security exemplar (i.e., a piece of stainless steel that is 3.7 ounces and in a shape resembling a handgun). There are exceptions, including for firearms manufactured for or sold to U.S. military or intelligence agencies. This bill requires firearms to contain detectable material after the removal of all parts other than major components. It defines detectable material as material that produces a magnetic field equivalent to that produced by 3.7 ounces of stainless steel. The bill also revises and broadens the exceptions to include firearms (1) received by, in the possession of, or under the control of the United States; or (2) produced pursuant to a contract with the United States.

Plain-English rewrite of the Congressional Research Service summary published on Congress.gov. Cached and reviewed.

Subjects

Crime and Law Enforcement
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