US Federal 2025-2026 Regular Session

US Federal Senate Bill SB1531

Introduced
 
Introduced
4/30/25  

Caption

Assault Weapons Ban of 2025

Summary

SB1531, titled the Assault Weapons Ban of 2025, would create a new federal prohibition on the importation, sale, manufacture, transfer, and possession of semiautomatic assault weapons and large-capacity ammunition feeding devices in interstate or foreign commerce. The bill amends federal firearms law in Title 18 to add detailed definitions for semiautomatic rifles, pistols, shotguns, belt-fed semiautomatic firearms, detachable and fixed ammunition feeding devices, barrel shrouds, threaded barrels, pistol grips, folding or telescoping stocks, and related terms. It also includes extensive lists of named firearm models and variants that would be covered, while carving out exemptions for certain manually operated firearms, rimfire firearms, antique firearms, and specified grandfathered models listed in an appendix. The bill would generally allow continued possession of firearms and magazines lawfully owned on the date of enactment, but it would restrict future transfers of grandfathered semiautomatic assault weapons unless they pass through a licensed importer, manufacturer, or dealer and comply with federal background-check procedures. It also adds a secure-storage requirement for grandfathered assault weapons when they may be accessible to prohibited persons, requires serial numbers and manufacture dates on newly made covered weapons and large-capacity feeding devices, and expands seizure and forfeiture provisions to cover these items. In addition, the bill authorizes Byrne grant funding for buy-back programs and makes the relevant violations subject to federal penalties. If enacted, the bill would significantly expand federal firearms restrictions by creating a new nationwide assault-weapons ban and magazine-capacity limit, while also imposing new marking, storage, transfer, and enforcement requirements. It would amend multiple sections of the Gun Control Act of 1968 and related federal statutes, including background-check and forfeiture provisions, and would direct the Attorney General to maintain public records of crimes involving semiautomatic assault weapons. The measure would affect gun owners, dealers, manufacturers, law enforcement agencies, and federal and state enforcement authorities. The available context shows no committee debate or recorded votes, so there is no documented legislative sentiment beyond the bill’s introduction and referral to the Senate Judiciary Committee. Based on the sponsors and the bill’s structure, the measure appears to reflect strong support from gun-regulation advocates and likely opposition from gun-rights proponents, but the provided record does not include formal testimony or vote outcomes. The bill’s detailed exemptions for certain law-enforcement and grandfathered firearms suggest an attempt to balance restrictions with limited carveouts. The main points of contention are likely to be the breadth of the definition of "semiautomatic assault weapon," the inclusion of many common rifle and shotgun models, the magazine-capacity limit, and the transfer restrictions on grandfathered firearms. Critics may argue that the bill reaches beyond military-style weapons and could affect widely owned sporting and hunting firearms, while supporters are likely to emphasize public-safety goals, crime prevention, and the need to regulate high-capacity and rapid-fire firearms. The grandfathering and exemption provisions may also be contested as either too narrow or too broad depending on the perspective.

Impact

The bill would amend Title 18 of the U.S. Code, especially sections 921, 922, 923, and 924, to create a new federal assault-weapons and large-capacity magazine regime. It would prohibit future importation, manufacture, sale, transfer, and possession of covered firearms and feeding devices, while allowing limited grandfathered possession and specified exemptions for government, law enforcement, nuclear-security personnel, and certain listed firearms. It would also add serial-number/date-marking requirements, secure-storage rules for grandfathered weapons, background-check procedures for transfers of grandfathered assault weapons, and expanded forfeiture authority, thereby directly affecting gun owners, dealers, manufacturers, and enforcement agencies nationwide.

Sentiment

No committee transcript or vote record was provided, so there is no formal recorded sentiment from debate or roll call. The bill’s introduction by a large group of Senate Democrats suggests support among gun-control advocates, and the absence of recorded opposition in the materials does not indicate consensus. Overall, the bill appears to be framed as a public-safety measure, but it is also the kind of proposal that typically draws strong partisan and interest-group division.

Contention

The most likely contention centers on whether the bill’s definitions are too expansive and whether it would sweep in firearms commonly used for hunting, sport shooting, or home defense. Opponents are likely to object to the broad model lists, magazine-capacity limits, and restrictions on possession and transfer of grandfathered firearms, while supporters are likely to argue that the bill targets weapons and accessories associated with mass shootings and high-casualty attacks. Additional debate would likely focus on the practicality of enforcement, the background-check transfer system, the buy-back funding, and whether the exemptions for law enforcement and certain grandfathered models are sufficient or overly permissive.

Companion Bills

US HB3115

Related Assault Weapons Ban of 2025

Previously Filed As

US HB3115

Assault Weapons Ban of 2025

US A442

Strengthens State's assault weapons ban.

US S2309

Strengthens State's assault weapons ban.

US HB8694

Assault Weapon Financing Accountability Act

US SB1221

ASSAULT WEAPONS - AFFIDAVIT

US SB3348

ASSAULT WEAPONS - AFFIDAVIT

US H3041

Prohibition on Assault Weapons

US H5436

Establishes the Rhode Island Assault Weapons Ban Act of 2025.

US S0359

Establishes the Rhode Island Assault Weapons Ban Act of 2025.

US SF3654

Possession of semiautomatic military-style assault weapons banishment

Similar Bills

MN SF1596

Sale or transfer of a semiautomatic military-style assault weapon prohibition

MN HF2449

Semiautomatic military-style assault weapon sale or transfer prohibited, buyback program authorized for semiautomatic military-style assault weapons, and money appropriated.

NM SB279

Gas-operated Semiauto Firearms Exclusion Act

CO SB003

Semiautomatic Firearms & Rapid-Fire Devices

MN HF4483

Possession and transfer of semiautomatic military-style assault weapons after a specified date regulated, report required, and criminal penalties provided.

MN HF3433

Possession of semiautomatic military-style assault weapons banned, and criminal penalties provided.

MN HF3617

Possession of semiautomatic military-style assault weapons banned, and criminal penalties provided.

MN SF3654

Possession of semiautomatic military-style assault weapons banishment