Taking a suppressor out of state is legal in most cases and does not require you to file anything with the ATF beforehand, as long as your destination state allows civilian suppressor ownership. Eight states ban them outright, and carrying one into any of those states is a serious crime regardless of your federal tax stamp. Everything else is a matter of packing the suppressor correctly, carrying your paperwork, and knowing the rules for any state you pass through along the way.
No ATF Travel Form Needed
Most items regulated under the National Firearms Act require ATF Form 5320.20, the “Application to Transport Interstate or to Temporarily Export Certain National Firearms Act (NFA) Firearms,” before you can cross state lines with them. The form applies to machine guns, short-barreled rifles, short-barreled shotguns, and destructive devices.1Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Transport Interstate or Temporarily Export Certain National Firearms Act (NFA) Firearms – ATF F 5320.20 Information Collection Notice Suppressors and “any other weapons” are exempt. You can pack up a registered suppressor and drive to another state without notifying the ATF at all.
That exemption only removes the federal paperwork. It does nothing to the laws of the state you’re heading to. The most common mistake suppressor owners make is treating the federal green light as the whole story.
States Where You Cannot Bring a Suppressor
Eight states ban civilian suppressor ownership entirely, and your federal registration means nothing inside their borders:
- California
- Delaware
- Hawaii
- Illinois
- Massachusetts
- New Jersey
- New York
- Rhode Island
The District of Columbia also heavily restricts possession. If your destination sits in any of these jurisdictions, leave the suppressor at home.
Among the 42 states that do allow suppressors, Connecticut and Vermont permit ownership but prohibit using a suppressor while hunting. Every other allowing state also permits hunting use, though specific game regulations can limit that to certain species or seasons. Check the destination’s hunting rules if that’s your reason for the trip.
Driving Through a State That Bans Suppressors
The Firearm Owners Protection Act includes a “safe passage” provision at 18 U.S.C. ยง 926A that can protect travelers passing through restrictive states. If you may lawfully possess a firearm at your origin and destination, you can transport it through an intermediate state as long as it stays unloaded and inaccessible from the passenger compartment. In a vehicle without a separate trunk, the firearm must be locked in a container other than the glove compartment or center console.2Office of the Law Revision Counsel. 18 U.S. Code 926A – Interstate Transportation of Firearms
Suppressors qualify because federal law’s definition of “firearm” includes any firearm muffler or silencer.3Office of the Law Revision Counsel. 18 U.S. Code 921 – Definitions On paper, you can drive through New York or New Jersey between two legal states, provided the suppressor stays locked away and you don’t stop for anything beyond fuel or an emergency.
Safe passage is a legal defense, not a shield. An officer in a ban state who finds your suppressor during a stop can still arrest and charge you under state law, leaving you to raise FOPA as an affirmative defense in court. That means a lawyer, possibly time in custody, and a fight. Some restrictive states have prosecuted firearm cases aggressively even where FOPA arguably applies. The safer plan is to route around ban states when you can.
How to Pack a Suppressor for a Road Trip
Keep the suppressor in a locked hard-sided case, ideally in the trunk or a cargo area not reachable from the passenger seats. If it’s attached to a firearm, the firearm should be unloaded. This setup satisfies the FOPA storage requirements and lines up with most state transport laws for firearms generally.
Carry a copy of your approved ATF Form 4 showing the suppressor is registered to you. A physical copy is better than a phone-only version, since a dead battery at a checkpoint helps no one. If the suppressor is owned through an NFA trust, carry a copy of the trust document alongside the Form 4 so you can show you’re a responsible person on it.
State vehicle-storage rules vary. Some states require firearms locked specifically in the trunk. Others require ammunition stored separately. Look up the transport rules for every state on your route before you leave.
Flying with a Suppressor
You can fly domestically with a suppressor in checked baggage. The TSA treats suppressors the same as firearms: unloaded, packed in a locked hard-sided container, and declared to the airline at check-in.4Transportation Security Administration. Firearms, Firearm Silencers/Suppressors Suppressors are never allowed in carry-on luggage.
At the counter, you’ll complete a declaration card confirming the item is unloaded. Only you should hold the key or combination. TSA-approved locks that agents can open with a master key do not satisfy the rule; use a non-TSA lock. The airline may inspect the case or route it through separate TSA screening.
Airlines add their own layer. Some charge fees for declared firearms. Some want advance notice. Call ahead to confirm the procedure, and keep your tax stamp documentation in your carry-on so it’s on hand if anyone asks.
Shipping the Suppressor Instead
If flying with it sounds like too much trouble, you can ship the suppressor to yourself at your destination. Federal law allows this because you’re not transferring the item to another person; you receive and open the package yourself. Pack it in a locked case, insure it, and photograph the contents before you seal it.
Carrier policies are the friction point. UPS generally accepts firearm shipments only from licensed dealers. FedEx accepts firearms from individuals but typically requires shipment to a Federal Firearms License holder. USPS has strict rules and handles suppressors inconsistently. FedEx to an FFL at your destination is the most reliable path. Federal law requires written notice to the carrier that the package contains a firearm.5Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts
Permanently Moving to Another State
Moving is easier for suppressors than for other NFA items. Because suppressors are exempt from Form 5320.20, you don’t need to notify the ATF or wait for approval before permanently relocating your suppressor to a new state. The only condition is that your new home state allows suppressor ownership.
For a short-barreled rifle or machine gun, you’d need to file Form 5320.20, wait for approval, and only then move the item. Suppressor owners can simply pack up and go, assuming the destination is one of the 42 states that permit possession.
Traveling with a Trust-Owned Suppressor
When a suppressor is owned by an NFA trust, any trustee listed as a responsible person on the trust can legally possess it. A trustee traveling with the trust’s suppressor should carry both a copy of the trust and the Form 4 showing the trust as the registered owner.
The risk is handing the suppressor to someone who isn’t a responsible person on the trust. The NFA defines “transfer” broadly, so even a temporary handoff to a non-trustee can be treated as an illegal transfer. Keep possession with named trustees only.
Do Not Take a Suppressor Across an International Border
Suppressors are classified as defense articles under the International Traffic in Arms Regulations, specifically listed in Category I of the U.S. Munitions List as “silencers, mufflers, and sound suppressors.”6eCFR. 22 CFR 121.1 – The United States Munitions List The State Department applies this level of control because suppressors degrade an adversary’s ability to locate the source of gunfire.7Federal Register. International Traffic in Arms Regulations – US Munitions List Categories I, II, and III
Taking one outside the United States requires a State Department export license that civilians almost never receive. Exporting a defense article without a license is a federal crime under the Arms Export Control Act, and that applies to a hunting trip in Canada or Mexico just as it does anywhere else. Leave the suppressor stateside for any international travel.
What a Violation Costs
The NFA lists several prohibited acts a traveling suppressor owner can trip over: possessing a suppressor that isn’t registered to you, transporting an unregistered suppressor in interstate commerce, and making false statements on NFA paperwork.8Office of the Law Revision Counsel. 26 U.S. Code 5861 – Prohibited Acts
Any NFA violation carries up to ten years in federal prison, a fine of up to $10,000, or both.9GovInfo. 26 USC 5871 – Penalties These are felonies, and a conviction permanently strips your right to possess any firearm. If you’re caught with a suppressor in one of the eight ban states, state charges can stack on top of federal ones, and those state penalties often carry their own multi-year prison terms.