Buying magazines in another state is legal under federal law, which sets no capacity limit and requires no paperwork for a magazine-only purchase. What decides whether the trip is actually legal for you is state law on both ends: roughly 14 states and Washington, D.C. cap magazine capacity, and the rules in the state where you buy, the state where you live, and any state you drive through all apply independently. Get it wrong and the consequences run from a small civil fine to a felony conviction.
Why Federal Law Barely Touches Magazine Sales
Magazines sit in a gap in federal firearms law. Under 18 U.S.C. § 921, a “firearm” means a weapon that expels a projectile by explosive action, plus frames, receivers, silencers, and destructive devices. A magazine isn’t any of those.1Office of the Law Revision Counsel. 18 U.S. Code 921 – Definitions The same statute defines “ammunition” as cartridge cases, primers, bullets, and propellant powder, which also excludes magazines. Because a magazine is neither a firearm nor ammunition federally, the whole federal apparatus — background checks, Form 4473, dealer licensing, age rules — doesn’t apply when you buy one on its own.
Congress did ban magazines over 10 rounds in 1994, but that provision sunset in September 2004 and has not been renewed.2Office of the Law Revision Counsel. 18 U.S. Code 922 – Unlawful Acts There is no federal magazine registry and no federal cap on what you can buy, sell, or own.
In practical terms, you can walk into a gun shop in an unrestricted state, pay cash for a 30-round magazine, and complete zero federal paperwork. The federal question is settled. Every remaining question is a state question.
Which States Cap Magazine Capacity
About 14 states and Washington, D.C. limit magazine capacity. Most set the ceiling at 10 rounds; a few allow more. As of 2025–2026:
- 10-round limit: California, Connecticut, Maryland, Massachusetts, New Jersey, New York, Oregon, Rhode Island, Washington, and Washington, D.C.
- 15-round limit: Colorado (all firearms), and Illinois and Vermont (handguns; long guns capped at 10)
- 17-round limit: Delaware
- Handguns only: Hawaii caps handgun magazines at 10 rounds but doesn’t limit long gun magazines
The other 36 states have no statewide capacity limit, though some cities and counties impose their own. If both the state where you’re buying and the state where you live are on the unrestricted list, the transaction and the trip home are straightforward. If either one is on the list above, keep reading.
Your Home State Controls What You Can Keep
A legal purchase in one state does not immunize you from prosecution in another. If your state caps magazines at 10 rounds and you drive home with a 15-round magazine bought next door, you are violating your home state’s law the moment you cross the line. The purchase was legal where it happened. The possession is not legal where you live.
This trips people up regularly. Someone visits family in an unrestricted state, picks up a few standard-capacity magazines at a good price, and drives home without a second thought. In every state with a capacity ban, that’s a criminal offense, and not knowing the rule is not a defense.
Grandfather Clauses for Pre-Ban Magazines
Several states with capacity bans allow residents to keep magazines they legally owned before the ban took effect. Colorado, Connecticut, Massachusetts, New York, and Vermont all have some form of grandfather provision, each with its own cutoff date. Own the magazine before the law changed, keep continuous possession, and you’re typically fine.
Other states did not grandfather. Rhode Island required owners to modify, surrender, or transfer non-compliant magazines out of state by January 1, 2023. California initially grandfathered pre-2000 magazines, then eliminated that protection in 2016, banning possession regardless of when you acquired the magazine. New Jersey, Hawaii, and Washington, D.C. also declined to grandfather.
Connecticut required residents to register grandfathered magazines with the state inside a specific window. Miss the deadline and possession became illegal even for a magazine owned before the ban.
If your state has a capacity ban, don’t assume older magazines are automatically safe. Check whether a grandfather clause exists, whether it has expired, and whether registration was ever required.
Ordering Magazines Online From Out of State
No federal law prohibits buying magazines online from a retailer in another state. Because magazines aren’t firearms, they don’t have to ship through a local FFL, and the federal restrictions on interstate handgun sales don’t apply. As far as federal law is concerned, a retailer in one state can ship a magazine to a buyer in another.
The problem is on the receiving end. If your state bans magazines over 10 rounds, importing one — by mail or by car — violates that state’s law. Many online retailers voluntarily block shipments of restricted magazines to restricted states, both for their own liability and because some state laws specifically bar the sale or transfer of non-compliant magazines to in-state residents. Not every retailer screens, though, and the legal responsibility sits with you as the buyer.
Some restricted states also regulate magazine parts and rebuild kits designed to be assembled into a magazine that exceeds the limit. Ordering disassembled parts may still break your state’s law even though what arrived in the box wasn’t a complete magazine.
Driving Home Through Other States
This is where buyers get caught most often. The Firearm Owners’ Protection Act gives travelers a “safe passage” right to transport firearms through states where they’d otherwise be illegal, provided the firearm is unloaded and stored away from the passenger compartment.3Office of the Law Revision Counsel. 18 U.S.C. 926A – Interstate Transportation of Firearms Read the statute closely: it covers a “firearm” and mentions “ammunition.” It says nothing about magazines.
Because magazines fall outside FOPA’s language, you have to comply with the law of every state you drive through, not just your origin and destination. A trip from Pennsylvania to New Hampshire that cuts through New York or New Jersey means any magazines in your car must meet those states’ 10-round limits while you’re inside their borders. “Just passing through” won’t invoke FOPA protection for the magazines even when it does for the firearm.
When you have to move through a restricted state, the safest approach is to keep magazines unloaded, separated from both the firearm and the ammunition, and locked in a hard-sided container stored in the trunk or another area you can’t reach from the driver’s seat. That mirrors FOPA’s rules for firearms and shows good faith, even though FOPA itself doesn’t cover the magazines.
Flying With Magazines
Air travel has its own layer. TSA requires firearm magazines, loaded or empty, to be securely boxed or placed inside the hard-sided locked case that holds an unloaded firearm. Magazines go in checked baggage only, never carry-on, and you must declare the firearm at the airline counter during check-in.4Transportation Security Administration. Transporting Firearms and Ammunition
TSA rules get you through the airport. They do not override state law at your destination. Fly into a state with a 10-round cap and that cap applies the moment you pick up your bag, even if the magazines were legal where you boarded.
Penalties for Non-Compliant Magazines
Consequences vary widely by state. Some treat a first offense as a minor infraction with a civil fine. Others charge possession of a single non-compliant magazine as a felony carrying years in prison. Severity generally rises with repeat offenses or when the magazine charge rides along with other charges.
Across states with bans, penalties tend to fall into three tiers:
- Civil penalties: some states impose fines for a first offense of simple possession, sometimes as low as $100.
- Misdemeanor charges: a second offense, or a first offense involving sale or transfer, often rises to a misdemeanor carrying up to a year in jail.
- Felony charges: repeat offenses, large quantities, or possession tied to other criminal activity can bring felony prosecution with sentences ranging from 16 months to several years, depending on the state.
A felony conviction has a downstream effect worth knowing about. Under federal law, convicted felons cannot possess any firearm. A magazine that was legal where you bought it can, if carried into the wrong state and prosecuted as a felony, end with the loss of your gun rights entirely.
A Short Checklist Before You Buy
The law here isn’t complicated so much as fragmented. Federal law mostly stays out of it, roughly a third of states are in, and their rules differ in ways that matter. Before buying a magazine in another state, in person or online, work through four questions:
- Does the state where you’re buying have a capacity limit? A licensed retailer there shouldn’t sell you a non-compliant magazine, but private sales and gun shows don’t always have the same guardrails.
- Does your home state have a capacity limit? If yes, it applies the moment the magazine crosses the line, regardless of where you bought it.
- What’s your route home? FOPA doesn’t cover magazines in transit. Driving through a restricted state means complying with that state’s law or routing around it.
- Does your state grandfather pre-ban magazines? If you’re buying used magazines older than your state’s ban, check whether a grandfather clause still applies and whether registration was ever required.
State magazine laws have been changing frequently, with new bans enacted and existing ones challenged in court. A rule that looked settled last year may be under injunction or newly amended today. When you’re unsure, pull the current statute from your state legislature’s website rather than trusting a summary that may be out of date.