01The rules in detail
US domestic: declare at the counter, firearm unloaded in a locked hard-sided case only you can open, ammunition (typically up to 11 lb / 5 kg) in original or purpose-made packaging, separate from the firearm or in the same case depending on the airline. Replica and toy guns are also banned from carry-on. International: most countries require import/transit permits obtained in advance and many prohibit firearms entirely; airlines require advance notice. Bringing a firearm to a security checkpoint, even by mistake, results in arrest and large civil penalties in the US.
02Tips
- Read both TSA's page and the airline's firearm policy — they differ in detail.
- Never assume a state permit covers another state or country.
03Frequently asked
Can I bring a firearm in my carry-on?
No. Never in the cabin. In the US, unloaded firearms may be checked in a locked hard case, declared at check-in, with ammunition in original packaging (limits apply). International transport requires permits from every country on the itinerary and airline approval.
Can I pack a firearm in checked luggage?
Yes, with limits. Never in the cabin. In the US, unloaded firearms may be checked in a locked hard case, declared at check-in, with ammunition in original packaging (limits apply). International transport requires permits from every country on the itinerary and airline approval.
Are the rules the same outside the US?
Mostly similar for liquids and batteries, which follow international standards, but sharp objects, tools, lighters and self-defense items vary widely by country. Check the departure airport's rules and the destination's laws.
TSA and other agencies allow officers to refuse any item they judge unsafe, and rules change. This page summarises published guidance as of the verified date; confirm on tsa.gov or your airport's site before packing anything unusual.