S. 1374 119th Congress Senate

BUMP Act

Official title: A bill to amend title 18, United States Code, to prohibit machinegun conversion devices and illegal modifications of semiautomatic firearms, and for other purposes.

Introduced: April 9, 2025 Introduced by: Martin Heinrich Democratic · New Mexico See on congress.gov

Crime and Law Enforcement

Everywhere this bill has been 2 steps

Introduced

In committee

Reported out

Passed House

Passed Senate

To President

Became law

Apr 9, 2025

Read twice and referred to the Committee on the Judiciary.

Apr 9, 2025

Introduced in Senate

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What's happening now April 9, 2025

Read twice and referred to the Committee on the Judiciary.

Plain-English summary Congressional Research Service

Banning Unlawful Machinegun Parts Act or the BUMP Act

This bill generally prohibits the import, sale, manufacture, transfer, receipt, or possession of

a device that is primarily designed, or redesigned, to increase the rate of fire when attached to a semiautomatic firearm;
a device, part, or combination of parts that is designed and functions to increase the rate of fire of a firearm; or
a semiautomatic firearm that has been modified to materially increase the rate of fire or to approximate the action or rate of fire of a machine gun.

Additionally, the bill adds to the list of firearms subject to regulation under the National Firearms Act semiautomatic firearms that have been modified to materially increase the rate of fire or approximate the action or rate of fire of a machine gun.

Related & companion bills 1

Bill text 1 version

Introduced in Senate Formatted Text PDF Formatted XML

Source documents hosted by congress.gov.

Committees of jurisdiction 1

Judiciary Committee
Senate

Lobbying activity 20

Registered lobbyists who named this bill in their disclosure filings. Source: federal Lobbying Disclosure Act filings.

BRADY CAMPAIGN TO PREVENT GUN VIOLENCE
for BRADY CAMPAIGN TO PREVENT GUN VIOLENCE · District of Columbia · 3rd Quarter 2026 (July 1 - Sep 30)
NATIONAL ASSOCIATION FOR GUN RIGHTS
for NATIONAL ASSOCIATION FOR GUN RIGHTS · Colorado · 3rd Quarter 2026 (July 1 - Sep 30)
NATIONAL ASSOCIATION FOR GUN RIGHTS
for NATIONAL ASSOCIATION FOR GUN RIGHTS · Colorado · 2nd Quarter 2026 (Apr 1 - June 30)
BRADY CAMPAIGN TO PREVENT GUN VIOLENCE
for BRADY CAMPAIGN TO PREVENT GUN VIOLENCE · District of Columbia · 2nd Quarter 2026 (Apr 1 - June 30)
NATIONAL ASSOCIATION FOR GUN RIGHTS
for NATIONAL ASSOCIATION FOR GUN RIGHTS · Colorado · 1st Quarter 2026 (Jan 1 - Mar 31)
GIFFORDS
for GIFFORDS · District of Columbia · 1st Quarter 2026 (Jan 1 - Mar 31)

Bodies those filers lobbied

HOUSE OF REPRESENTATIVES
20 filings
SENATE
20 filings
Bureau of Alcohol Tobacco Firearms & Explosives
12 filings
Executive Office of the President (EOP)
10 filings
Justice, Dept of (DOJ)
5 filings
Education, Dept of
4 filings
Veterans Affairs, Dept of (VA)
4 filings
U.S. Fish & Wildlife Service (USFWS)
1 filing

A filing lists the bills it worked on and the parts of government it contacted in separate sections, so these are the bodies those filers named anywhere in the filing, not a per-bill breakdown.

See all 20 filings →

Cosponsors 30