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H.R. 4221: Undetectable Firearms Modernization Act

Overview

This bill is known as the Undetectable Firearms Modernization Act and aims to update the existing Undetectable Firearms Act of 1988. The goal of the modernization is to enhance regulations concerning firearms that are nearly undetectable by security equipment used in public places, such as airports.

Key Provisions

The bill introduces several amendments to Section 922(p) of title 18 of the United States Code, which pertains to undetectable firearms.

Definitions and Changes

  • Modification of Terminology

    The bill revises the definitions within the law to clarify what constitutes an undetectable firearm. It replaces the language that described undetectable parts and materials with more precise terms, focusing on any firearm part that does not contain detectable material.
  • Detection Criteria

    It changes the criteria for what makes a firearm undetectable. The previous wording that involved comparisons to the "Security Exemplar" is removed and replaced with clearer language that emphasizes the absence of detectable materials in various firearm components.
  • Major Components Defined

    The bill defines "major components" of firearms, specifically identifying elements such as the slide, cylinder, frame, or receiver. For rifles and shotguns, the bill includes the barrel as a major component.
  • Detectable Material

    The bill establishes a definition for detectable material, specifying it as materials that create a magnetic field strength equivalent to a certain amount of stainless steel. This establishes a measurable standard for detection.

Prototypes and Exceptions

  • Prototypes Included

    The term “firearm” is expanded to include prototypes, thereby bringing any prototype weapons under the same regulations as standard firearms.
  • Exceptions Clarified

    The bill clarifies exceptions to the undetectable firearms prohibition. It states that the law does not apply to firearms that are in the possession of the federal government or those manufactured or imported by licensed manufacturers under contract with the U.S. government.

Conclusion on the Act's Purpose

The central purpose of the Undetectable Firearms Modernization Act is to strengthen the regulations surrounding firearms that could evade security systems, thereby enhancing public safety in various transportation and public venues.

Relevant Companies

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This is an AI-generated summary of the bill text. There may be mistakes.

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Sponsors

1 sponsor

Actions

2 actions

Date Action
Jun. 27, 2025 Introduced in House
Jun. 27, 2025 Referred to the House Committee on the Judiciary.

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