Bringing firearms into Mexico is legal for foreign visitors only with an advance permit from SEDENA, Mexico’s Secretariat of National Defense, and only for hunting or competitive shooting. The permit has to be in your hand before you reach the border, the firearms must fall within a narrow list of permitted types and calibers, and you also need U.S. export paperwork on the American side. Plan on at least two months of lead time. Getting a detail wrong at a Mexican port of entry or military checkpoint can mean arrest and prosecution in federal court.
What You Can Actually Bring
Start here, because this is where most American gun owners are surprised. Mexico’s Federal Law of Firearms and Explosives reserves a long list of calibers for the exclusive use of the Army, Navy, and Air Force. The reserved list under Article 11 sweeps in weapons that are ordinary in the United States.1Cámara de Diputados. Ley Federal de Armas de Fuego y Explosivos
Reserved for the military:
- Handguns in 9mm Parabellum or Luger, .357 in any variant, .38 Super, 5.7x28mm, and all calibers above .380.
- Rifles in .223, 5.45mm, 5.56mm, 7mm, 7.62mm, .30, and .50, along with anything larger.
- All fully automatic firearms, sub-machine guns, and machine guns in any caliber.
- Silencers, bayonets, and magazines designed for the weapons above.
In plain terms: your .45 ACP pistol, your 9mm, your .308 deer rifle, and any AR-platform rifle are prohibited. Bringing one across without authorization means seizure and federal charges.
What you can bring on a temporary import permit is narrow:
- Bolt-action rifles in most calibers except .50, with barrels at least 16 inches long. Semi-automatic rifles are not permitted.
- Shotguns, including semi-automatics, in 12 gauge or smaller, with barrels at least 25 inches long.
- Handguns only in .22 LR and .22 WMR. No other handgun calibers qualify.
- A maximum of two long guns per hunter.
The action matters as much as the caliber. A bolt-action .30-06 is allowed; a semi-auto in the same caliber is not. Semi-auto shotguns are fine.1Cámara de Diputados. Ley Federal de Armas de Fuego y Explosivos
Ammunition is capped by caliber and permit. Under Article 50, permitted quantities run up to 500 rounds for .22 caliber (excluding .22 Magnum, Hornet, and TCM) and up to 1,000 rounds of permitted shotgun shells. Your SEDENA permit will state the exact quantities authorized for your trip, and inspectors count rounds at the border. Anything over the number on your permit is confiscated and can void the permit entirely.1Cámara de Diputados. Ley Federal de Armas de Fuego y Explosivos
The SEDENA Permit
Mexico’s military controls all civilian firearms in the country, and temporary import by a foreigner requires an extraordinary permit issued by SEDENA. The physical paper permit must be in your possession before you cross. An email confirmation or digital copy will not get you through the inspection.
What the Application Requires
SEDENA’s form asks for detailed technical data on every firearm: serial number, manufacturer, model, caliber, and barrel length. Everything is filed in Spanish, and every entry has to match the markings on the weapon exactly. Any discrepancy between the paperwork and what an inspector reads off the gun will stall or kill the application.2Agencia Nacional de Aduanas de México. Mercancia Regulada por Parte de la Secretaria de la Defensa Nacional
You also submit a valid passport, proof of citizenship or legal residence, and documentation of purpose: typically a valid hunting license or a formal invitation from a recognized Mexican shooting club. Personal details across your ID, passport, and permit application must all match.
Where to File and How Long It Takes
Applications go through a Mexican Consulate or directly to SEDENA offices. Fees are paid at authorized bank branches using a government tax payment form, and you keep the original receipt for the filing package. Administrative review generally runs fifteen to thirty business days, so starting at least two months before your trip is the minimum safe margin. If SEDENA asks for clarification, the clock effectively resets.2Agencia Nacional de Aduanas de México. Mercancia Regulada por Parte de la Secretaria de la Defensa Nacional
Approved permits are picked up in person at the submission office or a designated military zone.
U.S. Paperwork Before You Leave
Taking a personally owned firearm out of the United States, even temporarily, is an export under federal law. Two pieces cover it.
CBP Form 4457
Complete a Certificate of Registration for Personal Effects Taken Abroad (CBP Form 4457) and present the firearms in person to a CBP officer before leaving the country. The officer inspects the guns, signs the form, and returns it. On your way home, the same signed form proves the firearms are U.S.-origin property and not a new import. Form 4457 has no legal effect in Mexico and does not substitute for the SEDENA permit.3U.S. Customs and Border Protection. Temporarily Taking a Firearm or Ammunition Outside the United States for Personal Reasons
License Exception BAG
Under the Export Administration Regulations, U.S. citizens and lawful permanent residents can temporarily export personal firearms without a full export license by using License Exception BAG. The limits: no more than three firearms and no more than 1,000 rounds of ammunition per trip, carried in personal baggage, for your own use, and returned to the United States when the trip ends.4eCFR. 15 CFR 740.14 – Baggage (BAG) Mexico’s own limits are stricter, and those are what control at the border.
At the Border and Inside Mexico
At the Mexican port of entry, you declare the firearms in the customs area. Military personnel inspect each weapon by hand: they read serial numbers, verify calibers, and compare every detail to your SEDENA documentation. They count ammunition against the authorized quantity. If everything matches, officials stamp the permit to record a legal entry.5Secretaría de la Defensa Nacional. Aspectos Relacionados con las Armas de Fuego (Personas Fisicas)
Once inside Mexico, the rules stay tight. Firearms travel completely unloaded and secured in a locked, hard-sided case at all times outside the hunting area. Ammunition goes in a separate container.6Bureau of Alcohol, Tobacco, Firearms and Explosives. Traveling With Firearms Keep the SEDENA permit physically with the guns, not in a separate bag or vehicle. Military highway checkpoints are common, and soldiers will check that your route, your firearms, and your paperwork all line up.
The permit authorizes hunting or competitive shooting at the destinations named on it. It does not authorize carry for personal protection, and it does not authorize casual use along the way. Firing a permitted rifle outside its stated purpose puts you in violation of the permit terms.
Leaving Mexico
Exit through an authorized port of entry and present the stamped SEDENA permit so officials can verify every firearm on the permit is leaving with you. Without that exit record, Mexican authorities have no proof the weapons left, which can create a permanent entry ban or a criminal file waiting on your next visit.
On the U.S. side, hand your signed CBP Form 4457 to the returning officer so the firearms clear back in as American-origin personal property.3U.S. Customs and Border Protection. Temporarily Taking a Firearm or Ammunition Outside the United States for Personal Reasons
If You Get It Wrong
Mexico treats unauthorized firearms possession as a federal crime. Crossing with an undeclared firearm, or a single forgotten round of ammunition in a glove compartment, can produce an arrest, a vehicle seizure, and federal prosecution. Penalties scale with the type and quantity of weapons, and sentences for possessing military-reserved firearms run in years. Pretrial detention is common, bail is not guaranteed, and cases move slowly.
U.S. citizens arrested in Mexico receive consular assistance from the American Embassy, but the embassy cannot intervene in the Mexican judicial process or negotiate charges away. The permit process is slow and unforgiving, and it is the only lawful path.