The Firearm Owners Protection Act is a 1986 federal law that rewrote parts of the Gun Control Act of 1968 to ease burdens on lawful gun owners and licensed sellers, while at the same time closing the civilian market to any newly manufactured machine gun. It narrowed the federal definition of a firearms dealer, created a safe-passage right for people transporting guns across state lines, capped how often the ATF can inspect licensed dealers, barred the federal government from building a gun registry, and — through the Hughes Amendment — cut off private ownership of machine guns made after May 19, 1986. These rules still set the outer limits of what private owners, casual sellers, and licensed dealers can do under federal law today.
Who Counts as a Firearms Dealer
Before FOPA, the Gun Control Act’s definition of “dealer” was broad enough that someone selling a few guns from a personal collection could be prosecuted for dealing without a license. FOPA tightened the definition to reach people whose regular course of trade or business is buying and selling firearms for profit. Casual sellers and hobbyists fell outside that line and no longer needed a Federal Firearms License.
The distinction still matters. Licensed dealers must run every buyer through the National Instant Criminal Background Check System. Private sellers who are not engaged in the business have no federal background-check duty, though many states have passed their own laws to fill that gap. FOPA also raised the government’s burden when prosecuting an unlicensed seller: prosecutors must show the seller knowingly sold to a prohibited person.
In 2024, using authority from the Bipartisan Safer Communities Act of 2022, the ATF finalized a rule broadening what counts as being “engaged in the business.” The rule clarified that a person can be shown to “predominantly earn a profit” without actually receiving money, and it set out presumptions for conduct that qualifies as dealing. A federal court in Texas issued a preliminary injunction blocking enforcement against several states and gun-rights organizations, and the rule’s future is unsettled.1ATF. Final Rule: Definition of “Engaged in the Business” as a Dealer in Firearms
Safe Passage Across State Lines
FOPA’s safe-passage rule, at 18 U.S.C. § 926A, protects gun owners driving through states with restrictive laws. If you can legally possess the firearm where your trip starts and where it ends, federal law shields you from prosecution under any state or local law you pass through along the way.2Office of the Law Revision Counsel. 18 USC 926A – Interstate Transportation of Firearms
The protection is not automatic. You have to meet specific storage requirements throughout the trip, and the travel has to be reasonably continuous. Courts read “transit” narrowly. Stopping for gas or a meal is fine. Extended layovers where you take possession of the firearm inside a restrictive jurisdiction can strip the federal shield entirely, and in at least one Third Circuit case an overnight hotel stop after a diverted flight was enough to put the traveler outside § 926A and expose him to arrest under state law.
How the Gun Must Be Stored During Travel
Two conditions have to hold for the entire trip. The firearm must be completely unloaded, and neither the gun nor any ammunition can be readily or directly accessible from the passenger compartment.2Office of the Law Revision Counsel. 18 USC 926A – Interstate Transportation of Firearms In a car with a separate trunk, that usually means locking both in the trunk.
If your vehicle has no separate trunk, such as an SUV, hatchback, or pickup, the statute requires the unloaded firearm and ammunition to be in a locked container other than the glove compartment or center console. A locked hard-sided case in the cargo area is the standard fix. Federal law does not require ammunition to be in a separate container from the gun, but keeping them physically apart makes your compliance harder to dispute if you are stopped in a jurisdiction hostile to gun owners.
The Hughes Amendment Machine Gun Ban
Section 922(o), known as the Hughes Amendment after its sponsor, made it illegal for any private citizen to transfer or possess a machine gun manufactured after May 19, 1986.3Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts The only exceptions are machine guns held by or transferred to government agencies, and those that were already lawfully registered and possessed before that date.
Because no new machine guns can enter the civilian market, the transferable supply is permanently frozen. Entry-level transferable machine guns start around $25,000, and registered M16 receivers or Thompson submachine guns regularly sell for $30,000 to $45,000 or more. Buying one means going through the National Firearms Act process: an ATF Form 4, fingerprints, a passport-style photo, a background check, a $200 federal transfer tax, and ATF approval before you can take possession. As of January 2026, the $200 transfer tax still applies to machine guns even though Congress eliminated the tax for most other NFA items.1ATF. Final Rule: Definition of “Engaged in the Business” as a Dealer in Firearms
Possessing an unregistered machine gun is a federal felony. Under the NFA penalty provisions, conviction carries up to ten years in prison and a fine of up to $10,000, and prosecutors can seek higher fines under general sentencing statutes.4Office of the Law Revision Counsel. 26 US Code 5871 – Penalties
Who Is Barred From Having Firearms
FOPA broadened the reach of the federal prohibition on gun possession under 18 U.S.C. § 922(g). The pre-1986 language was tied to shipping or receiving a firearm “in interstate or foreign commerce,” which left a narrow gap for purely in-state possession. FOPA changed the language to cover possession “in or affecting commerce,” which reaches virtually any firearm, since almost all guns cross a state line during manufacturing or distribution.3Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts
The prohibited categories today include anyone convicted of a crime punishable by more than one year in prison, fugitives from justice, unlawful users of controlled substances, people adjudicated as mentally defective or committed to a mental institution, anyone dishonorably discharged from the military, people who have renounced U.S. citizenship, individuals subject to certain domestic-violence restraining orders, and anyone convicted of a misdemeanor crime of domestic violence.3Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts Some were added after 1986, but FOPA’s broader jurisdictional language gave all of them real enforcement reach.
Federal law technically lets a prohibited person petition the Attorney General for relief from these disabilities under 18 U.S.C. § 925(c). That path has been closed in practice since 1992, when Congress began barring the ATF from spending appropriated funds to investigate or act on the applications, a ban renewed every year since.5Federal Register. Application for Relief From Disabilities Imposed by Federal Laws With Respect to the Acquisition Some states offer their own restoration procedures, but those do not always satisfy federal requirements.
What Changed for Licensed Dealers
FOPA capped the ATF’s routine oversight of licensed dealers at one warrantless compliance inspection per twelve-month period per licensee, with exceptions for inspections tied to an active criminal investigation or the tracing of a specific firearm.6Office of the Law Revision Counsel. 18 USC 923 – Licensing Dealers still have to keep the full records federal law requires, and violations can cost them their license, but the once-a-year ceiling on routine inspections is one of FOPA’s most significant dealer protections.
The law also dropped the federal requirement that dealers log the identities of most ammunition buyers. Standard ammunition sales no longer trigger paperwork. Armor-piercing ammunition is the exception: dealers must still record buyer information for it, and FOPA banned the manufacture, importation, and sale of armor-piercing ammunition to the general public, with narrow exceptions for government use, export, and authorized testing.3Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts
No Federal Firearms Registry
FOPA barred the federal government from setting up any system of registration for firearms, firearms owners, or firearms transactions. Under 18 U.S.C. § 926, no federal rule issued after May 19, 1986 may require that dealer records be transferred to or maintained at a federal or state facility. The ATF can still trace individual guns during criminal investigations, but it cannot build or hold a centralized database of who owns which firearms. That is why the agency still traces guns through manual searches of paper records and calls to dealers.
The registry ban has limits worth knowing. It does not stop states from running their own firearms registries, and a handful do. It also does not touch the National Firearms Registration and Transfer Record kept under the National Firearms Act for items like machine guns, short-barreled rifles, and suppressors, which have been registered in a federal database since 1934 and were left alone by FOPA.