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Undetectable Firearms Modernization Act
To modernize the Undetectable Firearms Act of 1988.
Summary
This bill would update the 1988 Undetectable Firearms Act by modernizing how "undetectable" firearms are defined under federal law. Currently, the law references an outdated "Security Exemplar" standard and specific x-ray machines; this bill would replace that with a definition based on whether a firearm contains sufficient detectable material equivalent in magnetic strength to 3.7 ounces of stainless steel. It would also update references to airport security screening to reflect modern detection technology and clarify that major firearm components include the slide, frame, receiver, and barrel. The bill includes exemptions for firearms in government possession and those manufactured under contract with the U.S. government.
AI-generated plain-language summary of the bill text — neutral, and may be imperfect. See the full text below for the exact wording.
Sponsor (1)
Money behind the sponsor
Top reported contributors to Madeleine Dean’s campaign committee (2024 cycle) — who funds the bill’s sponsor, not a claim about this bill. Data from FEC.
- APOLLO GLOBAL $16,500
- KBRA $13,000
- LINDY COMMUNITIES $8,600
- DIVERSIFIED SEARCH $6,940
- LINDY PROPERTY MANAGEMENT $6,800
Organizations whose employees gave the most — itemized individual contributions grouped by the donor’s reported employer (FEC Schedule A). Full finance for Madeleine Dean → · Outside spending →
Actions (2)
- Jun 27, 2025 Referred to the House Committee on the Judiciary. · house
- Jun 27, 2025 Introduced in House
Similar bills (6)
Bills with similar text or summary — includes reintroductions across Congresses. Ranked by semantic similarity of the bill text (computed locally); a neutral discovery aid, not a claim the bills are duplicates.
Text versions (1)
Bills are re-published as they move (Introduced → Reported → Engrossed → Enrolled …). Each stage below is a separate text; pick two to see what changed. Data from Congress.gov.
Full text
IN THE HOUSE OF REPRESENTATIVES
June 27, 2025
Ms. Dean of Pennsylvania introduced the following bill; which was referred to the Committee on the Judiciary
A BILL
To modernize the Undetectable Firearms Act of 1988.
Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled,
SECTION 1. SHORT TITLE.
This Act may be cited as the “Undetectable Firearms Modernization Act”.
SEC. 2. MODERNIZATION OF THE PROHIBITION ON UNDETECTABLE FIREARMS.
Section 922(p) of title 18, United States Code, is amended—
(1) in paragraph (1)—
(A) in subparagraph (A), by striking “grips, stocks, and magazines, is not as detectable as the Security Exemplar, by walk-through metal detectors calibrated and operated to detect the Security Exemplar” and inserting “all parts other than major components, does not contain detectable material”; and
(B) in subparagraph (B), by striking “when subjected to inspection by the types of x-ray machines commonly used at airports, does not generate” and inserting the following: “if subjected to inspection by the types of detection devices commonly used at airports for security screening, would not generate”;
(2) in paragraph (2)—
(A) by striking subparagraph (B) and inserting the following:
“(B) the term ‘major component’, with respect to a firearm—
“(i) means the slide or cylinder, or the frame or receiver of the firearm; and
“(ii) in the case of a rifle or shotgun, includes the barrel of the firearm; and”; and
(B) by striking subparagraph (C) and the proviso that follows and inserting the following:
“(C) the term ‘detectable material’ means material that produces a magnetic field that is equivalent in strength to the magnetic field produced by 3.7 ounces of 17-4 PH stainless steel.”;
(3) in paragraph (3)—
(A) in the first sentence, by inserting after “of a firearm” the following: “, including a prototype,”; and
(B) by striking the second sentence; and
(4) in paragraph (5), by striking “shall not apply to any firearm which” and all that follows and inserting the following: “shall not apply to—
“(A) any firearm received by, in the possession of, or under the control of the United States; or
“(B) the manufacture, importation, possession, transfer, receipt, shipment, or delivery of a firearm by a licensed manufacturer or licensed importer pursuant to an existing contract with the United States.”. <all>
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