To check if a gun is stolen, write down its serial number and ask your local police department or sheriff’s office to run it against the FBI’s National Crime Information Center stolen gun file before you pay. Private citizens can’t search NCIC themselves, but law enforcement can, and since 2024 licensed dealers have an option to check as well. Doing this before money changes hands is the single most effective way to avoid a federal charge that can carry up to ten years in prison.
Find the Serial Number First
Every commercially manufactured or imported firearm in the United States must carry a unique serial number permanently marked on the frame or receiver. Federal regulations require manufacturers and importers to engrave, cast, or stamp it in a way that can’t easily be removed.1eCFR. 27 CFR 478.92 – Identification of Firearms and Armor Piercing Ammunition by Licensed Manufacturers and Licensed Importers Depending on the model, you may also find markings on the barrel or pistol slide.
Write down the serial number along with the manufacturer’s name, model designation, and caliber or gauge. All of these help law enforcement positively identify the firearm. Inspect the gun physically before you agree to anything.
If the serial number looks ground down, filed, scratched, or re-stamped, stop. Walk away. Possessing a firearm with an altered or removed serial number is a separate federal crime carrying up to five years in prison, and that charge doesn’t require proving the gun was stolen. The defaced number alone is enough.2Office of the Law Revision Counsel. 18 USC 9223Office of the Law Revision Counsel. 18 USC 924 – Penalties
Ask Local Police to Run the Number
The FBI’s National Crime Information Center maintains a dedicated stolen gun file that local, state, and federal agencies can query. Federal regulations restrict NCIC access to criminal justice agencies and a handful of other authorized entities, so ordinary citizens can’t search it directly.4eCFR. 28 CFR 20.33 – Dissemination of Criminal History Record Information
What you can do is call the non-emergency line for your local police department or sheriff’s office and ask them to run a serial number for you. Most agencies will. Practices vary: some handle it at the front desk in a few minutes, others may ask you to bring the firearm in. Call first and ask how they prefer to do it. If you’re buying from a stranger, get the check done before you finalize the sale.
One caveat worth understanding. A clean NCIC result doesn’t guarantee the gun was never stolen. It only means the firearm hasn’t been reported stolen and entered into that database. A gun taken from a private owner who never filed a police report won’t show up. A clean result lowers your risk substantially, but it isn’t an absolute guarantee.
Online Stolen-Gun Databases
A few user-submitted sites, such as HotGunz, let you search serial numbers against voluntarily reported stolen firearms. They’re free and quick, and worth a check. But their coverage is a fraction of NCIC’s because they depend entirely on owners choosing to submit their guns’ information. Treat any online search as a supplement to a law enforcement check, not a replacement. A gun that appears in one of these databases is almost certainly stolen; a gun that doesn’t appear might still be.
Buying From a Licensed Dealer
Purchasing from a Federal Firearms Licensee is the safest path. The dealer runs a background check through the National Instant Criminal Background Check System, and the transaction creates a paper trail. Since 2024, FFLs also have the option to voluntarily check firearms against the NCIC stolen gun file before accepting them for resale.5Federal Bureau of Investigation. New Rule Provides Federal Firearms Licensees Access to FBI Records of Stolen Firearms
This stolen-gun check is separate from the standard NICS background check, and it’s voluntary. Not every dealer will run it on every firearm. If you’re buying a used gun, ask whether the dealer checked the serial number against the NCIC stolen gun file. Many used-gun dealers have run informal checks through law enforcement contacts for years, and the new system formalizes that process.
Precautions for Private Sales
Private sales between individuals carry the most risk. Federal law doesn’t always require a background check or official record-keeping for them, and this is where stolen firearms most commonly change hands. Your own due diligence matters most here.
Create a Bill of Sale
Write out a bill of sale that includes the seller’s full legal name, address, and a description of the identification they showed you. Record the firearm’s serial number, make, model, and caliber. Both parties sign and date it, and both keep a copy. A legitimate seller has no reason to refuse. If yours balks, that itself is information.
Watch for Red Flags
Even a first-time buyer can spot the obvious warning signs:
- Pricing well below market. A gun selling for half its used value deserves skepticism.
- Refusal to show identification.
- Pressure to close fast, especially in a parking lot or other informal setting.
- Any sign the serial number has been ground, filed, scratched, or re-stamped.
- A seller who can’t tell you anything about the firearm’s history.
Interstate Sales Have to Go Through a Dealer
Federal law prohibits an unlicensed person from transferring a firearm to someone who lives in a different state.2Office of the Law Revision Counsel. 18 USC 922 If you’re buying from a private seller in another state, the firearm must be shipped to an FFL in your state. You pick it up there after completing the standard background check and paperwork. Limited exceptions exist for inherited firearms and temporary loans for hunting or sporting events, but a standard purchase between residents of different states always requires an FFL in the middle. That requirement also creates a natural stolen-gun check opportunity, since the receiving dealer can run the serial number.
Check Your State’s Rules
Roughly half the states now require a background check for private sales, at least for handguns. In those states, private sales run through a licensed dealer who processes the same background check used for retail purchases. Fees generally run between $10 and $100. If your state requires this step, it adds meaningful protection, since the transaction flows through an FFL with access to NICS and potentially the stolen gun file.
Why Getting This Right Matters
Possessing a stolen firearm that has moved through interstate commerce is a federal felony punishable by up to ten years in prison and a fine.3Office of the Law Revision Counsel. 18 USC 924 – Penalties The statute requires that you knew or had “reasonable cause to believe” the firearm was stolen.6Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts
That knowledge element is why documentation and a serial number check protect you. If you paid a fair price, verified the seller’s identity, kept a bill of sale, and had law enforcement run the number, prosecutors would have a hard time proving you knew or should have known the gun was stolen. Buying a $900 pistol for $200 from a stranger in a gas station parking lot with no paperwork points the other direction.
If the Check Comes Back Stolen
If a serial number check reports the firearm as stolen, or you later discover a gun you already own was reported stolen, contact your local police department immediately. Explain how it came into your possession and hand over everything you have to identify the seller, including the bill of sale. Voluntarily reporting the situation and cooperating with the investigation cuts strongly against any claim that you knew the gun was stolen.
Do not try to return the gun to the seller yourself. Confronting someone who sold you stolen property is dangerous, and it can interfere with a law enforcement investigation. Let the police handle contact with the seller. When officers take possession of the firearm, ask for a property receipt documenting the serial number, make, model, and date of surrender. That receipt is your proof you turned the gun in voluntarily.