Can You Borrow Someone’s Firearm? State Lines, NFA, and Straw Buys

Borrowing someone’s firearm is legal under federal law in most in-state situations, but four things can change that fast: the borrower’s legal status, the type of firearm, whether the loan crosses state lines, and your state’s own rules. Get any one of those wrong and a casual favor can carry federal prison time ranging from one year to fifteen.

When a Private Loan Is Legal Under Federal Law

The Gun Control Act of 1968 requires licensed firearms dealers to run a background check through the National Instant Criminal Background Check System before completing a sale or transfer.¹ That requirement runs to dealers, not to private individuals. A private person who lends a firearm to another person in the same state does not need to involve a dealer or run a check.

There is no federal “purpose” test for a same-state loan between private parties. Lending a shotgun for home defense, letting a neighbor take a rifle out for a weekend, or handing a friend a handgun at the range does not violate federal law by itself. The “lawful sporting purposes” language that shows up in many discussions comes from a different provision governing interstate transfers, addressed below, and does not restrict in-state loans.

Two absolute federal restrictions still apply no matter where the loan happens: you cannot lend a firearm to someone who is legally prohibited from possessing one, and you cannot casually lend certain specially regulated weapons.

People You Cannot Legally Lend To

Providing a firearm to someone you know or reasonably believe falls into a prohibited category is a federal crime carrying up to 15 years in prison.² Federal law bars the following people from possessing any firearm or ammunition:³

Anyone convicted of a crime punishable by more than one year of imprisonment
Fugitives from justice
Regular users of illegal controlled substances, including marijuana under federal law
People adjudicated as mentally defective or committed to a mental institution at age 16 or older
Undocumented immigrants and most nonimmigrant visa holders
Anyone dishonorably discharged from the military
Anyone who has renounced U.S. citizenship
People subject to a qualifying domestic violence protective order
People convicted of a misdemeanor crime of domestic violence

The legal standard is “knows or has reasonable cause to believe.” You are not required to run a formal check on a friend, but you cannot ignore what you already know. If the person has mentioned a felony conviction, a pending restraining order, or ongoing drug use, lending them a firearm exposes both of you to prosecution.

The Marijuana Wrinkle

Marijuana remains a controlled substance under federal law, so a regular user is a prohibited person regardless of state legalization. In January 2026, the ATF issued an interim final rule revising the definition of “unlawful user” for firearms purposes.⁴ Under the updated definition, someone qualifies only if they use a controlled substance regularly over an extended period continuing into the present. Isolated or sporadic use no longer triggers the prohibition. Someone who uses marijuana every week or every few weeks likely still falls within it.

Crossing State Lines

Interstate loans are where the rules tighten. Federal law prohibits any non-licensed person from transferring a firearm to someone they know or reasonably believe lives in a different state, and “transfer” includes loans as well as sales and gifts.³ Two exceptions matter.

For long guns, you may temporarily lend a rifle or shotgun to an out-of-state resident for “lawful sporting purposes,” which covers hunting, target shooting, and organized competitions.³ The loan must be temporary, tied to a specific sporting activity, and legal in both states. Handing a hunting rifle to a friend visiting from another state for a weekend hunt fits. Handing over the same rifle with no particular activity attached does not.

For handguns, there is no sporting-purposes workaround between private individuals across state lines. A handgun loan to an out-of-state resident generally has to run through a licensed dealer in the borrower’s home state, with a background check and a transfer fee.

Lending to Someone Under 18

Lending a handgun to a minor is illegal under federal law except in narrow circumstances.³ All of the following must be true:

The handgun is used for employment, farming or ranching, target practice, hunting, or a firearm safety course
The minor has prior written consent from a parent or legal guardian who is not themselves prohibited
The minor carries that written consent whenever they have the handgun
The possession complies with state and local law

When transporting the handgun to and from the activity, the minor must keep it unloaded and in a locked container.³ A narrow self-defense exception allows a minor to possess a handgun to defend against an intruder in a home where they live or are an invited guest. Transferring a handgun to a minor when the lender has reason to believe the minor will use it in a violent crime carries penalties reaching 10 years.⁵

Federal law sets no minimum age for a minor’s possession of a long gun, but states frequently impose their own minimum ages and supervision rules.

Suppressors and Other NFA Items

Suppressors, short-barreled rifles, short-barreled shotguns, and machine guns fall under the National Firearms Act, and the rules for lending them are far stricter than for ordinary firearms. The NFA defines “transfer” to include loans, and any transfer without prior ATF approval, payment of the applicable tax, and registration to the new possessor is a federal crime.⁶ The penalty runs up to 10 years in prison and a $10,000 fine.⁷

In practice, if you individually own an NFA item, only you may possess it. Letting a friend fire your suppressor while you are physically present and in control is generally accepted. Walking away and leaving it in their hands is not. This trips people up constantly because it feels nothing like a “transfer” in ordinary speech.

The workaround is an NFA trust. When the item is registered to a trust rather than an individual, any trustee named in the trust document can lawfully possess and use it without the original purchaser being present.⁸ Every trustee must submit photographs, fingerprints, and pass a background check when the trust acquires a new NFA item.

How State Laws Can Override the Federal Baseline

Federal law is the floor. State law often goes further, and in some states it eliminates the federal flexibility for private same-state loans entirely. Check your state’s specific rules before any loan; that single step matters more than any other. Common state variations include:

Universal background check laws. Roughly a third of states treat any transfer, including a temporary loan, as a transaction that must run through a licensed dealer with a background check. In those states, handing a friend a rifle for a hunting trip without a dealer visit is illegal no matter what federal law allows.
Time limits. Some states that permit temporary loans cap them, with limits typically running from a few days to 30 days.
Handgun-specific restrictions. Several states restrict or prohibit private handgun loans while permitting temporary long-gun loans for sporting purposes.
Waiting periods. Where a dealer must be involved, a state waiting period can delay the borrower’s receipt by several days.
On-premises exceptions. When a club or range furnishes a firearm for use on its own premises, federal regulations do not require a background check, and most states follow suit. A rented or borrowed firearm that never leaves the range is generally treated differently from an off-premises loan.

If a licensed dealer has to be involved, expect a transfer fee. Dealers set their own, and rates vary, so call ahead.

Transporting a Borrowed Firearm

If you borrow a firearm and need to travel with it through states with restrictive gun laws, the Firearm Owners Protection Act provides a federal safe-passage right. Any person who may lawfully possess a firearm at both the starting point and the destination may transport it through intervening states, even states that would otherwise prohibit possession, if three conditions are met:⁹

The firearm is unloaded
Neither the firearm nor ammunition is readily accessible from the passenger compartment
If the vehicle has no separate trunk, the firearm and ammunition are in a locked container that is not the glove box or center console

Safe passage covers transit only. It does not authorize stopping for extended periods in a restrictive state and carrying the firearm around. Some states have arrested travelers who made stops, and asserting the federal defense afterward is possible but expensive and slow.

Sending a Borrowed Firearm to a Gunsmith

Federal law specifically allows a non-prohibited person to ship a firearm to a licensed dealer, manufacturer, or importer for repair, and the licensee may return it directly to that person without a background check or transfer form.¹⁰ Sending a gun to a gunsmith is not a “transfer” in the legal sense.

Civil Liability If the Borrower Causes Harm

Criminal exposure is not the only risk. If someone injures or kills another person with a firearm you lent, you can be sued under a legal theory called negligent entrustment. The principle is straightforward: if you provided a dangerous item to someone you knew or should have known was likely to misuse it, you bear financial responsibility for the resulting harm. Most states recognize the claim, and the standard of care courts apply to firearms is often high.

Negligent entrustment does not require intentional wrongdoing. Lending a gun to someone visibly intoxicated, someone who has voiced violent intentions, or someone with a known history of reckless behavior can be enough. Physical handoff is not required either; leaving a firearm accessible to someone you should have known was unfit can trigger the same liability.

Standard homeowners insurance often covers accidental firearm-related liability because firearms typically are not excluded from the policy’s liability section. Intentional or criminal acts by the borrower are universally excluded.

When a “Loan” Becomes a Straw Purchase

A loan that is not really a loan can be prosecuted as a straw purchase. Buying a firearm on behalf of someone who cannot legally buy one themselves, or dressing up a permanent transfer as a “temporary loan,” falls under federal straw-purchase and trafficking statutes and carries up to 15 years in prison.¹¹ The line between a long-term loan and a transfer is not always bright, and prosecutors have discretion to characterize the transaction based on the facts. If a borrower has kept the firearm for six months with no return date in sight, that starts to look less like a loan.

Keep any loan genuinely temporary and tied to a specific purpose or time frame. Federal law does not require written terms, but a short written agreement identifying the firearm, the borrower, the purpose, and an expected return date protects both parties if questions come up later.

1
eCFR. 28 CFR Part 25 Subpart A – The National Instant Criminal Background Check System
2
Office of the Law Revision Counsel. 18 USC 924 Penalties
3
Office of the Law Revision Counsel. 18 USC 922 Unlawful Acts
4
Federal Register. Revising Definition of Unlawful User of or Addicted to Controlled Substance
5
Department of Justice. Quick Reference to Federal Firearms Laws
6
Office of the Law Revision Counsel. 26 USC 5861 Prohibited Acts
7
Office of the Law Revision Counsel. 26 USC 5871 Penalties
8
ATF. NFA Handbook – Chapter 9 – Transfers of NFA Firearms
9
Office of the Law Revision Counsel. 18 USC 926A Interstate Transportation of Firearms
10
ATF eRegulations. 27 CFR 478.147 Return of Firearm
11
Office of the Law Revision Counsel. 18 USC 932 Straw Purchasing of Firearms