Closing the Bump Stock Loophole Act of 2025
- Sponsor
- Rep. Titus, Dina [D-NV-1]
- Committees
- Ways and Means Committee (primary)
- Last action
- Apr 9, 2025
Bottom line
The bill aims to enhance public safety by banning devices and modifications that allow semiautomatic firearms to mimic machinegun rates of fire, while also establishing a registration requirement for pre-existing modified firearms.
What it actually does
This bill amends federal law to prohibit the import, sale, manufacture, transfer, receipt, or possession of devices designed to materially increase the rate of fire of a semiautomatic firearm or approximate the action of a machinegun. It also prohibits semiautomatic firearms modified to achieve these effects and requires existing modified firearms to be registered under the National Firearms Act within 120 days.
Proponents argue
Supporters argue this bill is a crucial step to prevent mass shootings by closing dangerous loopholes that allow semiautomatic firearms to be converted into weapons capable of rapid, indiscriminate firing. They contend it clarifies existing law and addresses a significant public safety concern highlighted by past tragedies.
Opponents contend
Opponents may argue that this bill infringes on Second Amendment rights by restricting firearm modifications and potentially criminalizing law-abiding gun owners. They might also contend that the definitions are overly broad or that existing laws are sufficient to address the stated concerns without imposing new burdens on citizens.
The bill is concise and can be read quickly, allowing ample time for informed evaluation of its provisions.
Section 2(a)(1), amending 18 U.S.C. 921(a)
Definition of 'Semiautomatic Firearm'
This section adds a new definition for 'semiautomatic firearm' to federal law. It specifies a firearm that fires one cartridge per trigger pull, uses energy from firing to cycle the next round, and is not a machinegun. This definition is crucial as it sets the scope for the subsequent prohibitions and regulations within the bill.
Supporters argue
Supporters argue that a clear, statutory definition of 'semiautomatic firearm' is necessary to precisely target the devices and modifications the bill intends to prohibit, preventing ambiguity in enforcement and ensuring the law is applied consistently.
Critics contend
Opponents might argue that this definition, while seemingly straightforward, could be interpreted broadly in the future to encompass more firearms than intended, potentially laying groundwork for further restrictions on common firearms.
Tradeoffs
This provision balances the need for clear legal definitions to enable effective enforcement against concerns about potentially broad future interpretations that could impact a wider range of firearms.
Section 2(a)(2), inserting new 18 U.S.C. 922(v)(1)
Prohibition on Rate-of-Fire Increasing Devices and Modifications
This provision makes it unlawful to import, sell, manufacture, transfer, receive, or possess any device primarily designed to materially increase a semiautomatic firearm's rate of fire or approximate a machinegun's action. It also prohibits semiautomatic firearms that have been modified in such a way. This directly targets devices like bump stocks and other similar modifications.
Section 2(a)(2), inserting new 18 U.S.C. 922(v)(2)
Registration Requirement for Lawfully Modified Semiautomatic Firearms
For semiautomatic firearms that were modified as described in the prohibition *before* the bill's enactment, owners must register them with the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) within 120 days. Failure to register would make their possession unlawful, subjecting them to federal penalties.
Section 2(a)(2), inserting new 18 U.S.C. 922(v)(3)
Exemption for Government and Law Enforcement Entities
This subsection explicitly states that the prohibitions on devices and modified firearms do not apply to their importation, manufacture, sale, transfer, or possession by or under the authority of the United States government, any federal department or agency, or any state, tribal, or local government entity. This ensures that official government operations are not hindered.
Section 2(b), amending 26 U.S.C. 5845(a)
Inclusion of Modified Semiautomatic Firearms under National Firearms Act
This section amends the National Firearms Act (NFA) of 1934 to include modified semiautomatic firearms (specifically those described in the new 18 U.S.C. 922(v)(1)(C)) as 'firearms' subject to NFA regulations. This means they would be subject to NFA taxes, strict registration, and transfer requirements, similar to machineguns and short-barreled rifles.
Amends the National Firearms Act (NFA) to classify modified semiautomatic firearms (those that materially increase rate of fire or approximate machinegun action) as 'firearms' under the NFA.
Section 2(b), amending 26 U.S.C. 5845(a)
Why it matters:This is standard legislative practice for amending different sections of the U.S. Code. However, its placement in the Internal Revenue Code (NFA) rather than directly within Title 18 might make its full implications less immediately obvious to a reader not familiar with the NFA's regulatory power.
Case for: Supporters argue that classifying these modified firearms under the NFA is a logical step given their enhanced rate of fire, ensuring they are subject to the same stringent controls as other dangerous weapons like machineguns, which is essential for public safety.
Case against: Opponents contend that this NFA classification effectively bans these firearms for most civilians due to the high tax, extensive registration, and transfer requirements, which they view as an unconstitutional infringement on gun ownership and an overreach of federal power.
Estimated impact: Significantly increases the regulatory burden and cost for owners of these specific firearms, potentially leading to widespread non-compliance or divestment rather than effective registration.