Gun Laws Explained: Federal vs. State Regulations

Firearms law in the United States is a complex patchwork of federal statutes, state laws, and local ordinances. The Second Amendment to the Constitution protects the individual right to keep and bear arms, but that right is subject to regulation at every level of government. Understanding the interplay between federal and state firearms laws is essential for responsible gun ownership and compliance with the law. This guide provides a comprehensive overview of the current legal framework.

The Second Amendment

The Second Amendment states: "A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed." For much of American history, the scope of this amendment was debated. In District of Columbia v. Heller (2008), the Supreme Court held for the first time that the Second Amendment protects an individual's right to possess a firearm unconnected with service in a militia, and to use that firearm for traditionally lawful purposes such as self-defense within the home.

Two years later, in McDonald v. City of Chicago (2010), the Court held that this individual right applies to state and local governments through the Fourteenth Amendment, not just to the federal government.

In the landmark 2022 case New York State Rifle & Pistol Association v. Bruen, the Supreme Court established a new framework for evaluating firearms regulations. Under Bruen, the government must demonstrate that a firearms regulation is "consistent with this Nation's historical tradition of firearm regulation." This decision has led to a wave of legal challenges to gun control laws across the country.

Federal Firearms Laws

Several major federal statutes regulate the manufacture, sale, possession, and use of firearms in the United States.

The National Firearms Act (NFA) of 1934 was the first major federal gun control law. It imposes a tax on the manufacture and transfer of certain firearms and requires registration of those firearms. Covered weapons include machine guns, short-barreled rifles and shotguns, suppressors (silencers), and destructive devices. Individuals seeking to purchase NFA items must undergo an extensive background check, pay a $200 tax, and register the weapon with the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF).

The Gun Control Act (GCA) of 1968 established the modern framework for federal firearms regulation. It created the Federal Firearms License (FFL) system, requiring anyone engaged in the business of manufacturing, importing, or dealing in firearms to obtain a license. The GCA prohibits certain categories of people from possessing firearms, including convicted felons, fugitives from justice, unlawful users of controlled substances, persons adjudicated as mentally defective, illegal aliens, persons dishonorably discharged from the military, persons who have renounced U.S. citizenship, persons subject to domestic violence restraining orders, and persons convicted of misdemeanor domestic violence.

The Brady Handgun Violence Prevention Act of 1993 established the National Instant Criminal Background Check System (NICS). Licensed firearms dealers must conduct a background check on all prospective buyers before completing a sale. The FBI operates the NICS system, which searches multiple databases to determine whether the buyer is prohibited from possessing firearms. If the background check is not completed within three business days, the dealer may proceed with the sale — this is known as the "default proceed" or "Charleston loophole."

The Bipartisan Safer Communities Act of 2022 was the first significant federal gun legislation in nearly three decades. It enhanced background checks for firearms purchasers under 21 by requiring a search of juvenile and mental health records, provided funding for state crisis intervention programs (including red flag laws), closed the "boyfriend loophole" by extending firearms prohibitions to dating partners convicted of domestic violence, and clarified the definition of who is "engaged in the business" of selling firearms.

State Firearms Laws: Key Variations

State firearms laws vary enormously across the country. Key areas of variation include concealed carry, assault weapons, red flag laws, purchase requirements, and open carry.

Concealed Carry

As of 2025, 29 states have adopted "constitutional carry" or "permitless carry" laws, allowing residents to carry concealed firearms without a government-issued permit. The remaining states require a permit or license to carry a concealed weapon, although the standards for obtaining a permit vary. "Shall-issue" states must issue a permit to any applicant who meets specified criteria, while "may-issue" states give licensing authorities discretion to deny permits. Following the Bruen decision, several traditionally may-issue states have revised their permitting processes.

Assault Weapons Bans

Ten states plus the District of Columbia have enacted laws banning or restricting assault weapons. These states include California, Connecticut, Delaware, Hawaii, Illinois, Maryland, Massachusetts, New Jersey, New York, and Washington. The definition of "assault weapon" varies by state but generally includes semi-automatic rifles with detachable magazines and one or more military-style features, such as a pistol grip, folding stock, or flash suppressor. Several of these bans have faced legal challenges following the Bruen decision.

Red Flag Laws

As of 2025, 21 states and the District of Columbia have enacted Extreme Risk Protection Order (ERPO) laws, commonly known as "red flag" laws. These laws allow family members, law enforcement, or other specified parties to petition a court to temporarily remove firearms from an individual who poses a danger to themselves or others. The orders are typically issued for a limited period (often 14 days to one year) and include due process protections for the respondent.

Purchase Requirements

Many states impose additional requirements beyond the federal background check. These may include waiting periods (ranging from 24 hours to 14 days), purchase permits or firearms identification cards, registration of firearms, limits on the number of firearms that may be purchased within a specified period, and mandatory safety training or testing.

Open Carry

The majority of states allow some form of open carry — visibly carrying a firearm in public. However, some states require a permit for open carry, and a few states (including California, Florida, Illinois, New York, and South Carolina) generally prohibit open carry of handguns.

Firearms and Specific Locations

Both federal and state laws designate certain areas as gun-free zones. Federal law prohibits firearms in federal buildings, federal courts, airports (past security checkpoints), post offices, and schools (the Gun-Free School Zones Act). State laws may additionally restrict firearms in state and local government buildings, places of worship, bars and restaurants that serve alcohol, polling places, hospitals, stadiums, parks, and private property where the owner has prohibited firearms.

Interstate Travel with Firearms

The Firearm Owners Protection Act of 1986 includes a "safe passage" provision that protects travelers who are transporting legal firearms through states with restrictive gun laws, provided the firearms are unloaded and not readily accessible. However, this protection has been interpreted narrowly by some courts, and travelers should exercise caution when transporting firearms across state lines.

Key Takeaways for Gun Owners

Responsible firearms ownership requires understanding the laws that apply in your jurisdiction. Before purchasing, possessing, or carrying a firearm, you should research your state's specific laws regarding permits, registration, and carry restrictions. If you travel with firearms, familiarize yourself with the laws of every state you will pass through. Store firearms securely, particularly if children are present — many states impose criminal liability for failure to secure firearms. Stay current on changes in the law, as firearms regulations are evolving rapidly in the wake of recent Supreme Court decisions. When in doubt, consult with a qualified firearms law attorney in your state.