The gun control debate in the United States is a running argument over how far government can regulate firearms without crossing the Second Amendment. The Constitution protects an individual right to own common firearms for self-defense; federal statutes set rules for who can buy them, how sales work, and which weapons face extra restrictions; and the Supreme Court has recently changed the test courts use to judge whether any given gun law is constitutional. That change is why so many long-standing rules are now being re-litigated at the same time.
What the Second Amendment Actually Protects
For most of American history, courts didn’t clearly say whether the Second Amendment protected individuals or only militia service. That question was settled in 2008 in District of Columbia v. Heller, which held that the amendment protects an individual right to possess a firearm for traditionally lawful purposes, including self-defense in the home.1Legal Information Institute. District of Columbia v. Heller The ruling struck down D.C.’s handgun ban and established that the government cannot categorically prohibit an entire class of commonly owned firearms.
The bigger shift came in 2022 with New York State Rifle & Pistol Association v. Bruen. Before Bruen, most courts weighed the government’s public-safety interest against the burden on gun rights. The Supreme Court rejected that balancing approach. Under the new test, once the Second Amendment’s text covers the conduct at issue, the government must show any regulation is consistent with the nation’s historical tradition of firearm regulation.2Justia. New York State Rifle and Pistol Association Inc v. Bruen Courts now look to founding-era and 19th-century laws for historical analogues instead of deferring to modern legislative judgments about safety.
The Bruen test immediately caused confusion. Some lower courts read it so strictly that they struck down the federal ban on gun possession by people under domestic violence restraining orders. In 2024, the Supreme Court course-corrected in United States v. Rahimi. It upheld that ban and clarified that a modern regulation doesn’t need to be an exact copy of a founding-era law; it needs to be “relevantly similar” in why and how it burdens the right.3Legal Information Institute. United States v. Rahimi The Court pointed to historical surety laws and “going armed” statutes that allowed judges to disarm people who posed threats.
Together, these three cases define the current battleground. The right is individual. It covers common firearms for self-defense. Regulations need historical roots but not identical twins. Dozens of specific laws are still being tested against that framework in the lower courts.
The Federal Laws Already on the Books
Most proposals in the debate are attempts to expand, roll back, or reinterpret three federal statutes that have been layered on top of each other since 1934.
The National Firearms Act of 1934
The NFA doesn’t ban weapons outright. It makes certain categories expensive and burdensome to own, including short-barreled rifles and shotguns, machine guns, and suppressors.4Bureau of Alcohol, Tobacco, Firearms and Explosives. National Firearms Act Anyone making or transferring an NFA item pays a $200 tax, set in 1934 and never adjusted, and must register the item federally. A violation is a federal felony carrying up to ten years.5Office of the Law Revision Counsel. 26 USC 5871 – Penalties
The Gun Control Act of 1968
The GCA built the licensing system that governs commercial firearm sales. Anyone “engaged in the business” of selling guns must obtain a Federal Firearms License from the ATF, keep detailed sales records, and run background checks.6Bureau of Alcohol, Tobacco, Firearms and Explosives. Gun Control Act It also barred direct firearm sales between residents of different states unless routed through a licensed dealer.
The GCA’s biggest gap is the one still driving arguments today: the background check requirement applies only to licensed importers, manufacturers, and dealers. A private individual selling to another person in the same state faces no federal background-check requirement.7Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Some states have closed this gap with universal background-check laws. Many have not.
The Bipartisan Safer Communities Act of 2022
The BSCA was the first significant federal gun legislation in nearly three decades. It created two new federal crimes. Straw purchasing — buying a gun for someone who can’t legally buy one or wants to avoid a paper trail — now carries up to 15 years, or up to 25 years if the gun is tied to a violent felony, terrorism, or drug trafficking.8Office of the Law Revision Counsel. 18 USC 932 – Straw Purchasing of Firearms Firearms trafficking carries up to 15 years.9Office of the Law Revision Counsel. 18 USC 933 – Trafficking in Firearms Before the BSCA, prosecutors had to build these cases from weaker general provisions.
The BSCA also created enhanced background checks for buyers under 21. When a dealer runs a NICS check on someone under 21, the system pulls the buyer’s home-state juvenile justice and mental health records. If something is flagged, the review can extend from the standard three business days to as long as ten.10Congress.gov. S.2938 – Bipartisan Safer Communities Act The provision was a direct response to mass shootings by young adults with disqualifying juvenile records that a normal check wouldn’t have surfaced.
The Background Check Gap
Every sale from a licensed dealer runs through the FBI’s National Instant Criminal Background Check System. Most checks return an immediate “proceed” or “denied.” If the answer is “delayed” and three business days pass without a final response, the dealer may legally complete the sale.11Federal Bureau of Investigation. About NICS Critics call this the “default proceed” gap and say it lets prohibited buyers slip through when the system is slow.
The bigger fight is over who has to run a check at all. Because the NICS mandate applies only to licensed dealers, private sales in most states move without one. A related question is where the line falls between a casual seller and someone who needs a license. In April 2024, the ATF published a final rule attempting to clarify “engaged in the business.” It set rebuttable presumptions: repeatedly buying and reselling firearms within 30 days, selling new-in-box guns within a year of purchase, or taking similar steps indicating a profit motive would presume dealer status.12Bureau of Alcohol, Tobacco, Firearms and Explosives. Definition of Engaged in the Business as a Dealer in Firearms A federal court in the Northern District of Texas issued a preliminary injunction blocking enforcement against the challenging states and organizations, and ATF has been complying. Litigation continues, and the older, vaguer definition remains in effect.
Who Can’t Own a Gun
Federal law lists specific categories of prohibited persons under 18 U.S.C. § 922(g): anyone convicted of a crime punishable by more than a year in prison, fugitives, unlawful users of controlled substances, people adjudicated as mentally defective or involuntarily committed, individuals under domestic violence restraining orders, and those convicted of misdemeanor domestic violence, among others.13Bureau of Alcohol, Tobacco, Firearms and Explosives. Identify Prohibited Persons Rahimi confirmed that at least some of these categories, particularly disarming people a court finds to be a credible physical threat, satisfy the historical-tradition test.3Legal Information Institute. United States v. Rahimi
Federal law also bars transferring a handgun to anyone under 18, with narrow exceptions for employment, farming, hunting, target practice, and supervised activities.7Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Licensed dealers cannot sell handguns to anyone under 21, or long guns to anyone under 18. Private sellers face only the under-18 handgun restriction federally.
The Marijuana Trap
The “unlawful user of a controlled substance” category catches many people off guard. It applies to anyone who uses marijuana, even where the state has legalized it. Marijuana remains a Schedule I substance federally, and ATF Form 4473 warns explicitly that state legalization does not change the federal prohibition. A gun owner with a medical marijuana card who is involved in a self-defense shooting, or who simply undergoes a background check, faces potential federal charges. Answering the controlled-substance question falsely on the form is itself a federal crime.14Bureau of Alcohol, Tobacco, Firearms and Explosives. ATF Form 4473 – Firearms Transaction Record
Restoring Firearm Rights
Losing the right isn’t always permanent. Under 18 U.S.C. § 925(c), a prohibited person can apply to the Attorney General for relief from federal firearms disabilities by showing they won’t be a danger to public safety and that relief wouldn’t be contrary to the public interest. A denial can be reviewed in federal district court.15Office of the Law Revision Counsel. 18 USC 925 – Exceptions; Relief From Disabilities Congress blocked ATF funding to process these applications for decades. The Department of Justice published a proposed rule in 2025 to revive the program, with a final rule anticipated in 2026. State-level rights restoration varies, and a state pardon or expungement may or may not remove the federal prohibition depending on how it’s structured.
The Fights Over Specific Weapons and Accessories
Assault Weapons
There is no single federal definition of “assault weapon” in current law. The 1994 federal ban expired in 2004 and was not renewed. Several states maintain their own bans with varying definitions. Some list specific makes and models. Others prohibit semi-automatic firearms with combinations of features like pistol grips, folding stocks, or threaded barrels. Critics call the targeted features cosmetic; supporters say they’re common to weapons designed for rapid lethality. State bans are now being tested under Bruen, and lower courts are split on whether they survive.
Ghost Guns
For years, individuals could buy partially finished frames and receivers online, complete them at home, and end up with functional, untraceable firearms. The ATF updated its regulations under 27 CFR parts 447, 478, and 479 to redefine what counts as a “frame or receiver,” bringing those parts under the same rules as finished firearms.16Regulations.gov. Definition of Frame or Receiver and Identification of Firearms Manufacturers now must serialize the parts and sellers must run background checks. The Supreme Court upheld the rule 7–2 in 2025, finding the Gun Control Act’s definition of “firearm” broad enough to cover the kits.
Bump Stocks
Bump stocks harness a semi-automatic rifle’s recoil to reset and pull the trigger rapidly. After the 2017 Las Vegas mass shooting, the ATF classified them as machine guns, effectively banning them under the NFA. In Garland v. Cargill (2024), the Supreme Court struck down that classification, holding that a bump-stock-equipped rifle does not fire more than one shot “by a single function of the trigger” or “automatically” as the machine gun statute requires.17Supreme Court of the United States. Garland v. Cargill The decision was statutory, not constitutional; the Court said the ATF misread the law, not that Congress lacks power to ban bump stocks. Several states have enacted their own prohibitions since.
Suppressors
Suppressors remain NFA items, subject to the $200 tax, registration, and extended ATF approval times.4Bureau of Alcohol, Tobacco, Firearms and Explosives. National Firearms Act The Hearing Protection Act, which would remove suppressors from the NFA and treat them like ordinary firearms, was reintroduced in the 119th Congress but has not been enacted as of mid-2026.18Congress.gov. H.R. 404 – Hearing Protection Act
Where the States Diverge
Federal law is a floor. The practical experience of owning a gun changes dramatically at state lines.
Preemption
Many state legislatures have passed preemption laws that prevent cities and counties from setting gun restrictions stricter than state law. Others give local governments broad authority to write their own rules, producing a patchwork in which a firearm legally carried in one county could bring charges in the next.
Concealed Carry
Before Bruen, states split between shall-issue regimes, which required officials to grant a carry permit to anyone meeting objective requirements, and may-issue regimes, which gave officials discretion to deny permits absent a demonstrated need. Bruen struck down New York’s may-issue law and effectively forced remaining may-issue states to adopt objective, shall-issue standards.2Justia. New York State Rifle and Pistol Association Inc v. Bruen A growing number of states have gone further and adopted permitless, sometimes called constitutional, carry, allowing residents to carry concealed without any permit.
Waiting Periods and Red Flag Laws
Some states require a waiting period between purchase and delivery, from a few days to over a week, on the theory that a cooling-off window can prevent impulsive violence or self-harm. Others impose no waiting period beyond the NICS check itself.
Extreme Risk Protection Orders, commonly called red flag laws, exist in a growing number of states. They let family members, law enforcement, and in some places other individuals petition a court to temporarily remove firearms from someone who appears to pose an imminent danger. If a judge grants the order, the person must surrender their firearms for a set period, often several months to a year, with a right to a hearing to contest it. Because these operate in civil court, the burden of proof is lower than in a criminal case, but the person hasn’t been convicted of anything. Their constitutionality under Bruen and Rahimi is being actively litigated.
Safe Storage
There is no comprehensive federal safe-storage mandate. The main federal youth-access provision is the ban on transferring handguns to anyone under 18, with the supervised-activity exceptions noted above.7Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Roughly half the states have some form of child access prevention law. The strength varies widely. Some impose criminal penalties on adults who leave loaded firearms accessible to minors. Others apply only when a child actually uses the firearm and someone is injured. Safe storage has become a more central piece of the debate as data on youth firearm injuries has drawn legislative attention.