ATF Form 1 vs Form 4: What's the Difference?
If you're getting into NFA items like suppressors or short-barreled rifles, you'll run into two forms: Form 1 and Form 4. They sound similar but do completely different things — and they have very different wait times. Here's the plain-English breakdown.
The Core Difference in One Sentence
Form 1 is to make an NFA item yourself. Form 4 is to buy/transfer one from a dealer. That's the heart of it — who's creating the item determines which form you file.
ATF Form 1 — Application to Make
You file a Form 1 when you want to manufacture an NFA item yourself. The classic example is building a short-barreled rifle (SBR) by putting a short barrel or stock on a pistol, or making your own suppressor. You're the maker, so you register it before you build it.
- Who files: the individual or trust making the item.
- Common uses: SBRs, SBSs, building a suppressor, "any other weapons" (AOWs).
- Key point: approval must come before you make the item.
ATF Form 4 — Application to Transfer
You file a Form 4 when you're buying an already-made NFA item from a dealer — most commonly a suppressor. The item already exists; the Form 4 transfers it from the dealer's registration to you.
- Who files: the buyer (you), through the dealer.
- Common uses: buying a suppressor, an existing SBR, or a machine gun.
- Key point: the item sits at the dealer until your transfer is approved.
Side-by-Side Comparison
| Form 1 | Form 4 | |
|---|---|---|
| Purpose | Make your own NFA item | Buy/transfer an existing item |
| Who you're "getting it from" | Yourself (you make it) | A dealer |
| Typical items | SBR, SBS, home-built suppressor | Suppressor, existing SBR, MG |
| Individual vs trust | Both available | Both available |
| Current wait | — | — |
Why Do the Wait Times Differ?
Form 1 and Form 4 are processed somewhat differently and the ATF reports them separately. Wait times for each shift based on filing volume, whether you file electronically (eForm) or on paper, and current ATF backlog. In the 2026 era of eForms and the $0 tax stamp, both have dropped dramatically from the old multi-month norms — but they rarely match exactly, which is why we track them separately rather than blending them.
See Live Form 1 & Form 4 Times →Which One Do You Need?
- Buying a suppressor from a shop? → Form 4.
- Turning your pistol into an SBR yourself? → Form 1.
- Buying an already-built SBR from a dealer? → Form 4.
- Building your own suppressor? → Form 1.
Frequently Asked Questions
It varies and the two are reported separately by the ATF. Check our live tracker for current Form 1 and Form 4 times, since which is faster changes with ATF volume and filing method.
No. A Form 1 is for making an item yourself, so you file it directly. A Form 4 goes through the dealer transferring the item to you.
Yes. Both Form 1 and Form 4 can be filed via the ATF eForms system, which is significantly faster than paper filing.
Buying a suppressor from a dealer is a Form 4. Building your own suppressor would be a Form 1. Most people buy, so most suppressors are Form 4 transfers.