Bill · S. 1374· Senate(119-S-1374)
BUMP Act
- Introduced
- 4/9/2025
- Last activity
- 4/9/2025 — Read twice and referred to the Committee on the Judiciary.
- Sponsored by
- Martin Heinrich
- Cosponsors
- - 27 - 1
- Introduced
- In Committee
What this bill would do
The Banning Unlawful Machinegun Parts Act aims to amend title 18 of the United States Code. It seeks to prohibit the import, sale, manufacture, transfer, and possession of certain devices designed to increase a firearm's rate of fire. The bill also targets semiautomatic firearms that have been modified to approximate the rate of fire of a machinegun. To comply with the new law, individuals possessing such modified firearms must register them within a specific timeframe. This legislation includes specific definitions for semiautomatic firearms to clarify these prohibitions.
Yes
Does this put more limits on buying or owning guns?+5
The bill implements stricter controls on high-rate-of-fire devices and modified semiautomatic firearms.
Does this give the federal government more power?+3
The bill expands federal authority over the possession and registration of certain firearm types.
The opposite· 3 of 4
Would gun owners be better off under this?-6
The bill imposes new prohibitions on possession and requires registration for currently owned modified firearms.
Does this protect the right to own guns?-5
The bill restricts the possession and transfer of certain modified firearms and devices.
Would business owners be better off under this?-2
The bill imposes new restrictions on the sale and manufacture of specific firearm parts.
Who it would affect, and how
Potential Positive Impacts for People
-
Regulation of high-rate-of-fire devices: The bill prohibits devices designed to materially increase the rate of fire or approximate the action of a machinegun (Section 2(a)(2)(v)(1)(A)).
-
Regulation of firearm modifications: The bill prohibits semiautomatic firearms that have been modified to increase the rate of fire or approximate a machinegun's action (Section 2(a)(2)(v)(1)(C)).
-
Elimination of specific trigger-function bypasses: The bill prohibits devices that increase the rate of fire by removing the need for a separate movement for each trigger function (Section 2(a)(2)(v)(1)(B)).
Potential Negative Impacts for People
-
Mandatory registration requirements: Individuals who lawfully own or possess a modified semiautomatic firearm must register it in accordance with section 5841 of the Internal Revenue Code of 1986 within 120 days (Section 2(a)(2)(v)(2)).
-
New prohibitions on possession and commerce: After 120 days from enactment, it will be unlawful for any person to import, sell, manufacture, transfer, receive, or possess certain devices or modified firearms (Section 2(a)(2)(v)(1)).
Groups and Interests Ranking
Every group the model scored this bill for, from -10 to +10. Hover a score for the reason it gave.
- Demographic And Interest Groups
- Good For Gun Owners-6Good For Business Owners-2
- Governance And Ideology
- Increases Federal Power+3Improves Privacy Rights-2
- Social Issues And Justice
- Improves Gun Control Measures+5Improves Second Amendment Protections-5
- 1/29/2026
- 1 Cosponsor added.
- 10/7/2025
- 1 Cosponsor added.
- 7/22/2025
- 1 Cosponsor added.
- 4/9/2025
- Read twice and referred to the Committee on the Judiciary.
- 27 Cosponsors added.
- Introduced in Senate
One bill Congress.gov lists as related to this one — companions in the other chamber, earlier versions, and bills this one absorbed or was folded into.
Michael BennetDemocrat · Colorado
Richard BlumenthalDemocrat · Connecticut
Cory BookerDemocrat · New Jersey
Susan CollinsRepublican · Maine
Christopher CoonsDemocrat · Delaware
Catherine Cortez MastoDemocrat · Nevada
Richard DurbinDemocrat · Illinois
Tammy DuckworthDemocrat · Illinois
John FettermanDemocrat · Pennsylvania
Mazie HironoDemocrat · Hawaii
Amy KlobucharDemocrat · Minnesota
Mark KellyDemocrat · Arizona
Angus KingIndependent · Maine
Timothy KaineDemocrat · Virginia
Andy KimDemocrat · New Jersey
Edward MarkeyDemocrat · Massachusetts
Patty MurrayDemocrat · Washington
Alex PadillaDemocrat · California
John ReedDemocrat · Rhode Island
Jacky RosenDemocrat · Nevada
Bernie SandersIndependent · Vermont
Adam SchiffDemocrat · California
Jeanne ShaheenDemocrat · New Hampshire
Brian SchatzDemocrat · Hawaii
Tina SmithDemocrat · Minnesota
Chris Van HollenDemocrat · Maryland
Ron WydenDemocrat · Oregon
Peter WelchDemocrat · Vermont
Sheldon WhitehouseDemocrat · Rhode Island
Elizabeth WarrenDemocrat · Massachusetts