To carry a gun legally in the United States, you first have to confirm that federal law lets you possess a firearm at all, then follow your state’s rules for how you carry it, where you carry it, and what you do if you cross a state line or encounter a police officer. Federal law sets the floor on who is banned from having a gun. Everything above that floor — permits, training, open versus concealed, restricted locations, self-defense rules — is set by the state you are standing in at the moment. Those state laws change often, and the answer to “is this legal” can flip when you drive across a county line.
Confirm You Are Allowed to Have a Gun at All
Before permits or holsters, check whether 18 U.S.C. § 922(g) bars you from possessing any firearm or ammunition. The federal prohibitions cover:
- Anyone convicted of a crime punishable by more than one year in prison, which sweeps in virtually all felonies.
- Fugitives from justice.
- Anyone who unlawfully uses or is addicted to a controlled substance.
- Anyone a court has found mentally unfit or who has been involuntarily committed.
- Anyone in the country illegally, plus most non-immigrant visa holders.
- Anyone discharged from the military under dishonorable conditions.
- Former U.S. citizens who have renounced citizenship.
- Anyone subject to a qualifying domestic violence restraining order.
- Anyone convicted of a misdemeanor crime of domestic violence.
These bans apply everywhere in the country, and violating them is a federal crime.1Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts No state permit, and no constitutional carry law, overrides them. An old conviction or a dismissed restraining order does not automatically clear you. If any of this looks like it might apply to your history, talk to a lawyer before you handle a firearm.
Open Carry or Concealed Carry
There are two ways to carry a firearm in public: openly visible or hidden from view.
Open carry means the gun is plainly visible, typically in a hip or shoulder holster. Roughly 31 states allow open carry of a handgun without any permit, and several more allow it with a permit. A handful ban open carry of handguns entirely; a few others ban open carry of long guns while allowing handguns, or the reverse. Some courts have recently struck down open carry bans as unconstitutional, so the map keeps shifting.
Concealed carry means the gun is hidden, usually under clothing or inside a bag. Historically most states required a permit. Over the past decade a majority of states have moved to allow some form of permitless concealed carry, and the states that still require a permit run applicants through background checks, training, and fees.
The practical differences go beyond legality. Open carry is visible and can alarm people around you. Concealed carry avoids that, but it demands a serious holster and attention to printing — the outline of a gun showing through your clothes. Neither approach is inherently safer. What matters is that you are following the law in the exact place you are carrying.
Permitless Carry and Why a Permit Still Helps
As of mid-2024, 29 states let adults carry a concealed handgun without any permit, a policy often called constitutional carry or permitless carry. Details vary: some set the minimum age at 21, others at 18; some cover only residents, others extend to anyone legally allowed to possess a firearm.
Even where a permit is not required, getting one still has real value. A permit lets you carry in other states that recognize your home state’s license through reciprocity. It can exempt you from the federal Gun-Free School Zones Act restriction. And the training required to get a permit builds the skills daily carry actually demands. Skipping the permit because your state doesn’t require it is not the same as skipping training, and skipping training is a bad idea.
Getting a Concealed Carry Permit
Eligibility
States that issue permits share a common core. Most require applicants to be at least 21, though some allow 18 with military service. You typically need to be a U.S. citizen or lawful permanent resident and a resident of the state where you apply. You cannot fall into any of the federal prohibited categories. Many states add their own disqualifiers, including recent drug or alcohol convictions, certain mental health treatment histories, pending criminal charges, or a history of restraining orders.
Training
Most permit-issuing states require firearms safety training, and the rigor swings wildly. Some accept a basic online course of a few hours. Others require a full day of classroom instruction on state self-defense law, safe handling, and storage, followed by a live-fire test where you have to hit a target at set distances. Roughly 18 states require live-fire proficiency. Course costs typically run from about $150 to several hundred dollars, on top of the permit application fee.
Applying
Applications usually go to a local law enforcement agency, often the county sheriff, or through a state police website. You’ll fill out a form with your personal information and criminal and mental health history, submit fingerprints, provide a photo ID, show proof of residency, and attach passport-style photos. Fees range from about $40 to several hundred dollars and are almost always non-refundable, so verify eligibility before you pay. Processing takes anywhere from a few weeks to many months depending on the state.
Places You Cannot Carry, Permit or Not
A carry permit is not a universal pass. Federal law, state law, and private property rules combine into a patchwork of no-gun zones.
Federal Buildings
Carrying a firearm into any building owned or leased by the federal government where federal employees regularly work is a federal crime under 18 U.S.C. § 930. That covers post offices, Social Security offices, federal agency buildings, and VA facilities. Simple possession carries up to a year in prison; federal courthouses double that; bringing a gun into a federal building to commit a crime raises the maximum to five years.2Office of the Law Revision Counsel. 18 USC 930 – Possession of Firearms and Dangerous Weapons in Federal Facilities
School Zones
Federal law makes it illegal to possess a firearm within 1,000 feet of a public, private, or parochial school providing elementary or secondary education.1Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts In urban areas those 1,000-foot radii overlap and cover whole neighborhoods. Exceptions apply if you hold a carry license issued by the state where the school sits, if the firearm is unloaded and locked in a container, or if you are on private property that is not part of school grounds. The federal law covers K-12 only; universities and colleges are not included, though many states impose their own campus restrictions.
Airports
Federal regulations prohibit firearms past the security checkpoint, in what TSA calls the sterile area.3eCFR. 49 CFR 1540.111 – Carriage of Weapons, Explosives, and Incendiaries by Individuals You can transport a firearm in checked luggage if the gun is unloaded, packed in a locked hard-sided container, and declared to the airline at check-in.4Transportation Security Administration. Firearms Accidentally bringing a gun to a TSA checkpoint, even if you genuinely forgot it was in your bag, brings a civil penalty and possibly criminal charges.
State-Level and Private Property Bans
States add their own restricted locations: courthouses, polling places, government meetings, hospitals, public events, public transit, houses of worship. Around 14 states prohibit carrying in bars or establishments that primarily serve alcohol. Private property owners can also ban firearms on their premises. In some states, a posted no-firearms sign carries the force of law and ignoring it can bring a trespassing or weapons charge; in others, the sign is only notice and the worst outcome is being asked to leave. Find out how your state treats those signs before you walk past one.
When You Can Actually Use the Gun
Carrying creates a responsibility to know when the law allows you to use deadly force. State frameworks fall into three broad categories.
Duty to Retreat
Some states require you to try to safely retreat from a threat before using deadly force. If you could have walked away and chose not to, a self-defense claim can fail. The duty typically applies only outside your home.
Castle Doctrine
The castle doctrine removes the duty to retreat inside your own home. Most states recognize some version of it, and many extend it to your vehicle and workplace.
Stand Your Ground
About 27 states have stand your ground laws, which remove the duty to retreat anywhere you have a legal right to be. In those states you can use deadly force if you reasonably believe it is necessary to prevent death, serious injury, kidnapping, or certain other violent crimes, without first trying to escape.
Over 20 states also grant some form of civil immunity when a use of force is found legally justified. The strength varies: some provide full immunity from civil lawsuits, others only let you raise self-defense as a defense at trial without blocking the suit from proceeding. A justified shooting that avoids criminal charges can still bring a civil suit for damages. Know your state’s specific framework before you ever have to rely on it.
Crossing State Lines
Reciprocity
Each state decides on its own whether to honor concealed carry permits issued by other states. Some recognize permits from every state. Some recognize only permits from states with comparable training and background check standards. A few recognize none. These arrangements are often one-directional: your state may recognize another’s permits without the reverse being true. Federal reciprocity legislation has been proposed repeatedly and has not become law.5United States Congress. H.R. 38 – 119th Congress (2025-2026) – Constitutional Concealed Carry Reciprocity Act Until that changes, you are responsible for checking every state you plan to enter.
Federal Safe Passage Under FOPA
The Firearm Owners’ Protection Act, at 18 U.S.C. § 926A, offers a narrow protection for people transporting firearms through states where they’d otherwise be illegal. You can transport a firearm from one place where you may legally possess it to another, provided the gun is unloaded and neither the firearm nor the ammunition is readily accessible from the passenger compartment. If your vehicle has no separate trunk, both must be in a locked container other than the glove compartment or center console.6Office of the Law Revision Counsel. 18 USC 926A – Interstate Transportation of Firearms
This protection is narrower than most people think. It covers moving a firearm from point A to point B, not carrying it for self-defense along the way. Some courts have held that overnight stops or sightseeing detours end the protection. States with strict gun laws have been known to arrest travelers and let them argue FOPA as a defense afterward, which means legal fees and possible jail time even if you win.
Magazine Capacity
One of the easiest ways to cross a state line into a crime is carrying magazines that hold more rounds than your destination allows. Roughly 15 states limit magazine capacity, most commonly to 10 rounds; a few allow 15 or 17. Several make it illegal to even bring a high-capacity magazine across the border, not just to buy one locally. Penalties run from misdemeanors to felonies. Swap to compliant magazines before you cross the line.
Storing the Gun and What Happens If Someone Else Gets It
Roughly half the states plus the District of Columbia have child access prevention or safe storage laws. These generally impose penalties when a child gains access to a firearm that was not properly secured, ranging from civil fines of a few hundred dollars to misdemeanor charges, and escalating sharply if someone is injured or killed.
Even in states without a specific storage statute, a gun owner can face civil liability if an unsecured firearm is stolen and used in a crime, on a negligence theory. Some states also require you to report a lost or stolen firearm to law enforcement within a set window, sometimes as short as 24 hours, with fines or criminal charges for failing to report. A quality safe or lock box is cheap next to those consequences.
Telling Police You Are Armed
A number of states require you to immediately inform a law enforcement officer that you are carrying a firearm when the officer makes contact with you, such as during a traffic stop. In some, failing to disclose is a criminal offense and can cost you your permit. Others require disclosure only if the officer asks. The specific trigger varies; some laws apply only to permit holders, others reach anyone carrying under permitless carry provisions.
Even where the law does not require it, telling the officer at the start of the encounter is the smart move. Keep your hands visible, state that you have a firearm and where it is, and follow instructions. Surprising an officer with a concealed weapon in the middle of a stop is how routine encounters turn into something else.