H.R. 4221

119th Congress

In Committee

Undetectable Firearms Modernization Act

Sponsored byDemocrat:Rep. Dean, Madeleine [D-PA-4]PA· Introduced 27 June 2025

0

Cosponsors

3

Actions

0

Amendments

0

Committees

Since introduced

Introduced
Committee
Passed Chamber
Passed Both
Enacted
Step 1 of 0
Latest action

Referred to the House Committee on the Judiciary.

27 June 2025·1 year ago

Summary

Introduced in House · Updated 18 March 2026

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.

Timeline

3 actions

  1. Referred to the House Committee on the Judiciary.

    27 June 2025 · IntroReferral

  2. Introduced in House

    27 June 2025 · IntroReferral

  3. Introduced in House

    27 June 2025 · IntroReferral

Sponsorship

0 cosponsors

Classification

Policy area

Crime and Law Enforcement
Pelosi Tracker
© 2026 - All rights reserved. Powered by Vantara Labs
This website is an independent, third-party platform. It is not affiliated with, endorsed by, or in any way associated with Nancy Pelosi, her office, or her representatives. Any use of her name is solely for the purpose of discussing publicly available information.The information provided on this website is for informational and educational purposes only and is not intended to serve as, nor should it be construed as, financial or investment advice. The data presented here is sourced from publicly available filings and records. While we strive for accuracy, timeliness, and completeness, we do not guarantee that all information is error-free or current.