The Form 4, explained
The document that moves an NFA item from our books to your name — and the three mistakes that send it back.
What it is.
ATF Form 4 is the application to transfer and register a National Firearms Act item — a suppressor, an SBR, an SBS or an AOW — from a dealer to a private owner. It is the form that stands between paying for a suppressor and taking it home. Its sibling, the Form 1, is what you file to make an NFA item yourself, such as building an SBR from a rifle you already own.
Who fills in what.
We complete the transferor side: our licence details, the item, its serial number and its registration. You complete the transferee side: your details, your certification, and the responsible-person information if the applicant is a trust. Your fingerprints and photograph attach to the application.
Where it goes.
Filed electronically through the ATF eForms system, along with a notification to the chief law enforcement officer for your area — which is a notification, not a permission. Nobody local has to approve your purchase.
The three things that get it rejected.
Fingerprint cards the FBI cannot read, which is why digital capture matters. An incomplete responsible-person list on a trust — everyone with access has to be listed and printed. And an address or name that does not match your identification. Each one restarts your wait.
What you get back.
An approved Form 4 with a tax stamp on it. As of January 2026 that stamp shows $0 for suppressors, SBRs, SBSs and AOWs. Keep a copy with the item — you are not legally required to carry it, but you will be glad to have it.
Common questions
Form 4 or Form 1 — which do I need?
Form 4 to buy an NFA item from a dealer. Form 1 to make one yourself, such as building an SBR from a rifle you already own.
Does my sheriff have to approve it?
No. The chief law enforcement officer receives a notification copy. It is not a permission step and they cannot block your transfer.
Can I fill in the Form 4 myself at home?
The transferee section is yours, but we file it. Doing it together in the shop is how errors get caught before they cost you a restart.
What happens if it is rejected?
It comes back with a reason, we fix it, and it is refiled. That is why getting the prints and the details right the first time matters.