Carry laws vary by state more than almost any other area of American law. Roughly 29 states allow some form of permitless carry, letting anyone who can legally own a firearm carry one in public without a license. The rest require a permit, issued under either a shall-issue framework or a system reshaped by the Supreme Court’s 2022 decision in New York State Rifle & Pistol Association, Inc. v. Bruen. Federal law sits underneath all of it, controlling who can possess a firearm at all, where guns are banned regardless of state rules, and how you can legally move one across state lines.
The Three State Permitting Frameworks
Which framework applies to you depends entirely on where you are standing at any given moment. The Second Amendment protects the individual right to keep and bear arms, but states retain broad authority to regulate how that right is exercised in public.
Permitless Carry
Permitless carry, sometimes called constitutional carry, allows anyone who can legally possess a firearm to carry one in public without a government-issued license. The right to carry is the default rather than something you apply for. The only federal floor is the prohibited-person list discussed below. Even in permitless states, many residents still get a permit voluntarily because it makes travel to permit-required states possible.
Shall-Issue
Shall-issue states require a permit but run applications against an objective checklist. If you meet the criteria, the state must issue the license. The issuing authority has no discretion to deny you based on a subjective judgment about whether you “need” a firearm.
Common requirements include a minimum age of 21 (some states set it at 18 for certain applicants), a background check through the National Instant Criminal Background Check System, and completion of a firearm safety course. Training standards vary. Some states accept a classroom-only course of a few hours; others require live-fire qualification at a range. Fees range from under $50 to several hundred dollars, and permits are typically valid for two to seven years before renewal.
What Bruen Changed
Before Bruen, several states operated may-issue systems that gave local authorities wide discretion to deny permits. Applicants often had to demonstrate a “special need” for self-defense beyond what an ordinary person would face. The Supreme Court struck that approach down, holding that a proper-cause requirement violates the Fourteenth Amendment by keeping law-abiding citizens with ordinary self-defense needs from carrying in public. The majority also held that any firearm regulation must be consistent with the nation’s historical tradition of firearms regulation, replacing the means-end scrutiny test that lower courts had used for years. States that relied on subjective standards have since adopted objective, shall-issue frameworks.
Who Cannot Carry Anywhere
Regardless of your state’s permitting system, federal law bars certain people from possessing any firearm or ammunition. These prohibitions apply everywhere, including permitless-carry states, and violations are federal felonies. Under 18 U.S.C. § 922(g), you cannot possess a firearm if you:
- Have been convicted of any crime punishable by more than one year of imprisonment, whether or not you actually served time.
- Are a fugitive from justice.
- Use or are addicted to a controlled substance.
- Have been involuntarily committed to a mental institution or formally adjudicated as mentally unfit, a danger to yourself or others, lacking capacity to manage your affairs, or not guilty by reason of insanity. Voluntary admission to a mental health facility does not trigger this.
- Are subject to a qualifying domestic restraining order issued after a hearing you had notice of and an opportunity to attend, restraining you from threatening or harassing an intimate partner or their child.
- Have a misdemeanor conviction for domestic violence.
- Were dishonorably discharged from the military.
- Have renounced U.S. citizenship.
The mental health category catches people most often. A voluntary stay at a psychiatric facility does not disqualify you. A diagnosis alone does not either. The prohibition kicks in only when a court, board, or commission has formally adjudicated you as mentally unfit or ordered an involuntary commitment.
Concealed Carry vs. Open Carry
How you physically carry a firearm matters as much as whether you have permission to carry at all. Concealed carry means keeping the firearm hidden, typically in a holster under clothing or inside a bag. Open carry means wearing it visibly, in a belt or thigh holster. Many states treat these as separate legal categories with different rules.
A common arrangement is to allow open carry without a permit while requiring a license for concealed carry. Other states flip that or regulate both equally. A handful prohibit open carry entirely, even for permit holders. The practical difference is real: carrying concealed without a permit in a state that requires one is a criminal offense, even if open carry would have been perfectly legal in the same spot. Penalties can include misdemeanor charges, fines, and disqualification from future permits.
Reciprocity When You Cross State Lines
Your carry permit does not automatically follow you across state lines. No federal law requires one state to honor another state’s license, so a patchwork of agreements governs travel.
Full and Conditional Reciprocity
Some states recognize any valid carry permit issued anywhere in the country. That approach gives travelers the most predictable footing. More commonly, a state recognizes permits only from specific jurisdictions with which it has a formal agreement, usually based on similar training and background check standards. A state that requires live-fire qualification, for example, might refuse to honor a permit from a state with no training requirement. These agreements change frequently, and the only reliable way to confirm current status is through the attorney general’s website in the state you plan to visit.
Non-Recognition States
A handful of states refuse to recognize any out-of-state permit. In those jurisdictions, carrying based on your home-state license can lead to arrest and serious criminal charges. A legally armed person in one state can become a criminal the moment they cross a border. This is where most travelers get into trouble, especially when driving through a non-recognition state on the way to a destination where their permit is valid.
Resident vs. Non-Resident Permits
Many states issue permits to people who live elsewhere, but non-resident permits often carry less weight in reciprocity agreements. A state might honor a resident permit from a neighboring jurisdiction while refusing to recognize a non-resident permit issued by that same state. Before traveling, verify not only whether your destination has a reciprocity agreement but whether it covers the specific type of permit you hold.
Transporting Firearms Between States
Federal law provides a limited shield for people transporting firearms through states where they could not otherwise carry. Under 18 U.S.C. § 926A, you may transport a firearm from any place where you can lawfully possess it to any other place where you can lawfully possess it, regardless of state or local laws along the route. The catch is the storage rule during transit. The firearm must be unloaded, and neither the gun nor any ammunition can be readily accessible from the passenger compartment. If your vehicle has a trunk, both go in the trunk. If there is no trunk, both go in a locked container other than the glove compartment or center console.
This protection is narrower than it sounds. It covers transportation through a state, not extended stops within one. If you check into a hotel, go sightseeing, or otherwise interrupt your journey in a state that does not recognize your permit, the safe-passage defense may not apply. Courts have interpreted the provision strictly, and travelers have been arrested at airports and during traffic stops in restrictive states despite following the storage rules. The federal statute gives you an affirmative defense, not a shield against being arrested and forced to raise that defense in court.
The safe-passage provision also does not override state bans on specific items. If you drive through a state that prohibits magazines holding more than ten rounds, the federal transport rule will not protect you from a charge based on the magazine alone, even if the firearm itself is properly stored.
Air Travel
Flying with a firearm follows a separate set of federal rules enforced by the Transportation Security Administration. You may transport an unloaded firearm only in checked baggage, inside a locked hard-sided container. You must declare the firearm at the airline ticket counter during check-in. Ammunition must also travel in checked baggage and be securely packaged; loaded magazines must be boxed or enclosed in the same hard-sided case as the unloaded firearm. Firearms and ammunition are completely prohibited in carry-on bags. Bringing a loaded firearm to a security checkpoint can result in civil penalties ranging from $3,000 to over $17,000, plus a criminal referral. An unloaded, undeclared firearm found in checked baggage can trigger fines starting around $850.
Places Where Carry Is Off-Limits
A valid permit does not grant unlimited access. Federal law, state statutes, and private property rights all carve out locations where firearms are prohibited regardless of your credentials.
Federal Restricted Zones
Under 18 U.S.C. § 930, possessing a firearm in a federal facility is punishable by up to one year in prison and a fine. If you bring a firearm into a federal building intending to use it during a crime, the penalty jumps to up to five years. Federal facilities include courthouses, agency offices, and any building owned or leased by the federal government where employees perform official duties.
The Gun-Free School Zones Act makes it a federal crime to possess a firearm within 1,000 feet of any public or private elementary or secondary school. An exception exists if you hold a permit issued by the state where the school is located and that state required a law enforcement verification of your qualifications before issuing the license. That exception protects most resident permit holders in their home state, but it can fail to cover travelers relying on reciprocity with a permit from a different state. Carrying an unloaded firearm in a locked container inside a vehicle also falls outside the prohibition.
Postal property is another federal zone that catches people off guard. Under 39 CFR 232.1, no person may carry a firearm on postal property, openly or concealed, or store one there. The prohibition covers the building, the grounds, and the parking lot. There is no exception for permit holders.
Common State-Level Restrictions
States layer their own prohibited locations on top of federal zones. Bars and establishments that primarily sell alcohol are off-limits in most states, even with a permit. Government buildings, polling places during elections, and legislative chambers are frequently restricted. Many states ban firearms in hospitals, psychiatric facilities, and other medical settings. Large-capacity venues like stadiums and concert halls are restricted in some jurisdictions as well. Violations are typically state misdemeanors that can result in fines, jail time, and revocation of your carry permit.
Private Property and Signage
Property owners generally have the legal right to prohibit firearms on their premises. In many states, a posted sign meeting specific legal requirements has the force of law, so ignoring it can result in a criminal trespass charge rather than a simple request to leave. Signage requirements vary widely. Some states mandate specific dimensions, statutory language, or placement at eye level near every entrance. Others treat any clear notice as sufficient. Where signage laws are strict, a sign that fails technical specifications may be unenforceable, but you can still be asked to leave, and refusing that request is trespassing everywhere.
When You Can Actually Use the Firearm
Carrying a firearm legally does not automatically mean you can use it. The legal standard for justified deadly force varies by state, and getting it wrong can turn a self-defense situation into a murder charge.
Stand Your Ground
At least 31 states have adopted stand-your-ground laws, by statute or court decision, that eliminate any obligation to retreat before using force in a place where you are lawfully present. If you reasonably believe deadly force is necessary to prevent death or serious bodily harm, you can respond without first trying to escape. Several of these states go further and create a presumption that your fear was reasonable when someone unlawfully and forcibly enters your home or occupied vehicle, which shifts the burden to the prosecutor to prove you acted unreasonably.
Duty to Retreat
The remaining states impose a duty to retreat. You must make a reasonable effort to avoid the confrontation before resorting to deadly force, as long as retreating can be done safely. Failing to retreat when you could have done so can turn an otherwise justified shooting into a criminal act. This duty typically applies in public spaces, not inside your home.
Castle Doctrine
Nearly every state, including most duty-to-retreat states, recognizes some version of the castle doctrine: you have no obligation to retreat when defending yourself inside your own home. The scope varies. Some states extend castle-doctrine protections to your vehicle and workplace; others limit it strictly to your residence. A few states with castle-doctrine protections also grant civil immunity, so the person who broke in (or their family) cannot sue you for injuries resulting from justified self-defense.
Whichever framework applies, justified use of deadly force almost universally requires three elements: the threat must involve deadly force or the risk of serious bodily harm (proportionality); the use of force must be necessary to stop that threat (necessity); and you must have a reasonable belief that force is required (reasonableness). “Reasonable” is measured both by what you actually believed and by what a hypothetical rational person in the same situation would have believed.
Telling Officers You Are Armed
About a dozen states require you to immediately tell a law enforcement officer that you are carrying a firearm the moment an encounter begins, whether it is a traffic stop, a street detention, or another official interaction. You do not have to wait to be asked. In these duty-to-inform states, failing to volunteer the information right away can result in seizure of your firearm, suspension of your permit, and separate criminal charges on top of whatever prompted the stop.
Most other states take a softer approach: you only need to disclose if the officer specifically asks whether you are armed. A few states have no disclosure requirement at all. Regardless of which rule applies, keep your carry permit accessible alongside your driver’s license or ID. The permit serves as proof that you have cleared the required background check.
Making a false statement about whether you have a firearm during a law enforcement encounter is treated seriously everywhere. Depending on the jurisdiction, it can be charged as obstruction of justice or as a standalone firearms violation, and a conviction can permanently disqualify you from holding a carry permit. Officers routinely secure the firearm during the encounter for safety reasons, and once the stop concludes without further issues, the firearm is returned.
Restrictions on the Firearm Itself
A valid permit does not mean you can carry any firearm loaded with any ammunition. State-level hardware rules add another layer that varies sharply across borders.
Magazine Capacity
Around a dozen states restrict the capacity of detachable magazines, most commonly at ten rounds. A few states set the ceiling at 15 rounds, and at least one distinguishes between rifles and handguns with different limits for each. Possessing an over-capacity magazine while carrying in public can result in felony charges even if the firearm itself is completely legal. These laws are especially dangerous for interstate travelers who legally own high-capacity magazines at home but face criminal liability the moment they cross into a restricted state. The federal safe-passage provision does not protect against state bans on specific accessories.
Ammunition Types
Some states regulate the types of ammunition you can carry, most notably hollow-point rounds. Hollow points are standard self-defense ammunition across most of the country because they reduce the risk of a round passing through a target and hitting bystanders, but a small number of states treat them as restricted or prohibited outside the home. Carrying banned ammunition can add separate criminal charges on top of any other offense.
Firearm Features
A firearm that is legal to own and carry in one state may qualify as a prohibited “assault weapon” in another based on specific physical features like a folding stock, pistol grip, or threaded barrel. Feature-based definitions vary state to state. A firearm that meets the definition may still be legal to keep at home under a grandfathering provision while being illegal to carry in public. Carrying a restricted firearm often triggers sentencing enhancements beyond what would apply to an ordinary carry violation.
Preemption and Local Ordinances
Roughly 45 states have enacted preemption statutes that prevent cities and counties from imposing firearms regulations stricter than state law. In a preemption state, the carry rules are uniform: what is legal in a rural county is legal downtown in the largest city. That dramatically simplifies compliance for anyone moving around within the state.
The remaining states allow local governments to enact their own restrictions, which means a city can ban open carry, restrict where you can carry, or impose additional permit requirements that do not exist at the state level. Crossing from one municipality to another can change your legal obligations without warning. If you carry in a state without full preemption, checking local ordinances is not optional. A state-level permit does not override a city ordinance that bans carry in parks, for example, if the state has given that city the authority to regulate.