ATF Form 4, the Application for Tax Paid Transfer and Registration of Firearm, is the federal application you file to legally acquire a suppressor, short-barreled rifle, short-barreled shotgun, machine gun, destructive device, or any other weapon (AOW) regulated under the National Firearms Act. The licensed dealer holding the item files the application with you as the transferee, and you cannot take the firearm home until the ATF approves the transfer and issues a tax stamp.1Office of the Law Revision Counsel. 26 USC 5812 – Transfers
What Form 4 Covers
Form 4 is the transfer application for every category of NFA firearm: suppressors, SBRs, SBSs, machine guns, destructive devices, and AOWs.2Office of the Law Revision Counsel. 26 USC 5845 – Definitions One important limit applies to machine guns. Civilians can only acquire a machine gun that was already lawfully registered before May 19, 1986, which is why the civilian machine gun market is small and expensive.3Office of the Law Revision Counsel. 18 USC 922(o) – Machine Guns Anything manufactured after that date cannot move to a civilian buyer on a Form 4, regardless of how the paperwork is filed.
The Transfer Tax
The tax owed with a Form 4 depends on what you’re buying. Suppressors, SBRs, SBSs, and AOWs now transfer at $0. Machine guns and destructive devices still carry the $200 tax.4Office of the Law Revision Counsel. 26 USC 5811 – Transfer Tax
A $0 tax does not shorten the process. You still file the full application, sit through the background check, and wait for the registration. When a tax is owed, payment goes in with the application: electronically through eForms, or by check or money order for a paper filing. The ATF will not process a taxable transfer without payment attached.
Filing as an Individual vs. a Trust or Entity
Before anything else, decide whether the firearm will be registered to you personally or to a trust or legal entity like an LLC. The choice affects both the paperwork and who can legally touch the item.
Individual Filing
An individual application lists your legal name and address as the transferee. You submit fingerprints and a photograph as part of the identification process.1Office of the Law Revision Counsel. 26 USC 5812 – Transfers The catch is that only you can lawfully possess the item. A spouse, adult child, or friend cannot use, transport, or store it independently of you.
Trust or Entity Filing
A trust or entity is listed as the transferee, and a copy of the trust document or organizational paperwork accompanies the Form 4. Multiple trustees or authorized members can then legally possess the registered item, which is why many buyers set up an NFA trust before their first application.
That flexibility comes with more paperwork. Every “responsible person” on the trust or entity, meaning anyone with the power to direct management or to possess NFA items on the entity’s behalf, must complete ATF Form 5320.23 (the Responsible Person Questionnaire), submit fingerprints and a photograph, and pass a background check.5Bureau of Alcohol, Tobacco, Firearms and Explosives. Background Checks for Responsible Persons (Final Rule 41F)6Bureau of Alcohol, Tobacco, Firearms and Explosives. National Firearms Act (NFA) Responsible Person Questionnaire – ATF Form 5320.23 Adding a trustee after approval doesn’t trigger new background checks on existing items, but every future Form 4 requires all current responsible persons to go through the process again.
Who Cannot Receive an NFA Firearm
The ATF denies any Form 4 that would transfer an item to a person prohibited by federal law from possessing firearms. The federal prohibited categories include anyone convicted of a crime punishable by more than one year in prison, fugitives from justice, unlawful users of controlled substances, people adjudicated mentally defective or committed to a mental institution, certain non-citizens, anyone dishonorably discharged, anyone who has renounced U.S. citizenship, people subject to certain domestic restraining orders, and anyone convicted of a misdemeanor crime of domestic violence.7Office of the Law Revision Counsel. 18 USC 922(g) – Prohibited Persons
On a trust or entity application, one prohibited responsible person sinks the whole application. Screen every person you plan to list before you file. A denial after months of waiting is expensive to recover from.
What You Submit With the Application
Photograph
Each applicant, whether an individual transferee or a responsible person on a trust, provides a 2-by-2-inch color photograph showing a full front view of the face with head uncovered. The photo must be taken within one year of the application. On paper submissions, a photograph goes on each copy of the form; responsible persons attach photos to their Form 5320.23 as well.8eCFR. 27 CFR 479.85 – Identification of Transferee
Fingerprints
Two completed FBI Forms FD-258 fingerprint cards are required for each individual applicant or responsible person. The prints have to be clear enough to classify, so most people have them taken by a trained technician at a police department, UPS store, or fingerprint service. The eForms system also accepts electronic fingerprint submissions.
Firearm Details
The Form 4 must list the manufacturer, model, serial number, and caliber or gauge exactly as they appear on the firearm. A transposed serial digit or an abbreviated manufacturer name can delay or kill the application. The dealer usually enters this information; check it against the item’s markings yourself before signing.
CLEO Copy
You must send a completed copy of the Form 4 to the Chief Law Enforcement Officer, typically the local sheriff or police chief, in your locality. This is a notification, not a request for approval. The pre-2016 CLEO signature requirement no longer exists.5Bureau of Alcohol, Tobacco, Firearms and Explosives. Background Checks for Responsible Persons (Final Rule 41F) On a trust or entity application, every responsible person also sends a completed copy of their Form 5320.23 to the CLEO where that person lives. Many dealers handle the CLEO copy for their customers, but confirm it was actually done.
Signatures
Both the dealer (transferor) and the buyer or trust representative (transferee) sign and date the form, certifying that everything on it is accurate. Trust and entity applications must include completed Form 5320.23 packets for every responsible person before submission.
How the Application Gets to ATF
Form 4 can go in either electronically through the ATF’s eForms system or on paper to the NFA Division.9Bureau of Alcohol, Tobacco, Firearms and Explosives. eForms Applications In practice, almost every Form 4 today is filed through eForms. The dealer opens the application on their end and sends you a link to complete your portion, upload your photograph, and sign digitally. Payment, when required, is handled inside eForms. Paper submissions still exist but are slower and increasingly rare.
Once the application is in, the ATF enters it into the National Firearms Registration and Transfer Record.10Bureau of Alcohol, Tobacco, Firearms and Explosives. National Firearms Act Division
How Long Approval Takes
Processing times shift, and the ATF publishes current averages on its website. Recent figures:11Bureau of Alcohol, Tobacco, Firearms and Explosives. Current Processing Times
- Form 4 individual, eForms: about 10 days
- Form 4 individual, paper: about 21 days
- Form 4 trust, eForms: about 26 days
- Form 4 trust, paper: about 24 days
Trust filings run longer because the ATF must background-check every responsible person. These numbers are a significant improvement over the year-plus waits that were common before eForms matured. You can check status by contacting the ATF’s NFA Branch.
Do not take possession of the firearm from your dealer before the ATF issues approval. Possessing an unregistered NFA firearm is a federal crime whether or not you have a pending application.1Office of the Law Revision Counsel. 26 USC 5812 – Transfers
After Approval
When the ATF approves the transfer, the approved Form 4 comes back with a tax stamp (or a $0 notation) and goes to the dealer, who then contacts you to pick up the item. That is the moment you can legally take possession.
Keep the original approved Form 4 somewhere secure, like a safe. Carry a copy with the firearm whenever you transport or use it; you are required to retain proof of registration and produce it on ATF request.12Office of the Law Revision Counsel. 26 USC 5841 – Registration of Firearms If the item is titled to a trust, the stamp will not list individual trustees by name, so keep a copy of the trust document with the Form 4 copy in case you need to demonstrate your authority to possess it.
Taking It Across State Lines
The approved Form 4 lets you possess the firearm. It does not, on its own, let you travel with it across state lines. Interstate transport of most NFA firearms requires prior ATF approval on Form 5320.20.13Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Transport Interstate or Temporarily Export Certain NFA Firearms – ATF Form 5320.20 Suppressors are the exception and do not require a 5320.20 for interstate transport. Confirm your destination state actually allows civilian possession of the item; federal registration does not override state law, and several states and the District of Columbia prohibit one or more NFA categories outright. The ATF will deny a Form 4 in the first place if the transfer would violate state or local law.
Penalties for Getting It Wrong
NFA violations are federal felonies. A conviction can bring up to 10 years in prison, a fine of up to $10,000, or both.14Office of the Law Revision Counsel. 26 USC 5871 – Penalties The most common ways people cross the line are possessing an NFA firearm that isn’t registered to them, transferring an item outside the Form 4 process, and moving NFA items across state lines without approval.15Office of the Law Revision Counsel. 26 USC 5861 – Prohibited Acts Lending a suppressor registered only to you to a friend can qualify as an illegal transfer on its own. Filing false information on an NFA application is a separate offense under the same statute.