How to Register an SBR: ATF Form 1, eForms, and $0 Tax

To register a short-barreled rifle, you file an application with the ATF and wait for approval before you build or take possession of the firearm. If you’re building it yourself, that application is ATF Form 1. If you’re buying a completed SBR from a dealer, the dealer files ATF Form 4 for you. As of January 1, 2026, the federal making and transfer tax on an SBR is $0, but the approval process itself is unchanged, and assembling the firearm before your application is approved is still a federal felony.¹

What Counts as an SBR

Under federal law, a short-barreled rifle is a rifle with a barrel shorter than 16 inches, or a weapon made from a rifle with an overall length under 26 inches or a barrel under 16 inches.² SBRs are regulated under the National Firearms Act, which means you need ATF approval to make or possess one. Attaching a short barrel to a rifle receiver without that approval is a federal crime, even if you legally own the receiver.

Are You Building It or Buying It

The paperwork depends on how the SBR comes into existence. Building one yourself, whether from parts or by converting a rifle you already own, means filing ATF Form 1 (Form 5320.1), the application to make and register an NFA firearm.³ Buying a completed SBR from a licensed dealer means the dealer files ATF Form 4 (Form 5320.4) on your behalf.⁴ Both paths require your fingerprints, photograph, a background check, and ATF approval before you take possession. Most of what follows covers the Form 1 route, since that is what most people mean when they ask how to register an SBR.

The Tax Is Now $0

The NFA making tax on an SBR is $0. The $200 rate in the statute now applies only to machineguns and destructive devices; SBRs, silencers, and short-barreled shotguns carry a $0 making tax.⁵ Transfers are $0 as well.⁴ The “tax stamp” still exists as the document proving ATF approval, but you don’t pay anything for it.

Who Can Register an SBR

You must be at least 18 to file a Form 1 and make an SBR. The NFA sets no specific age floor for making a firearm, and the ATF has confirmed that 18-year-olds may submit Form 1 applications. Buying a completed SBR from a dealer is different: federal law bars dealers from selling firearms other than ordinary shotguns and rifles to anyone under 21, and an SBR is classified as an NFA firearm rather than a standard rifle.⁶

You cannot register an SBR if federal law prohibits you from possessing firearms. That covers anyone convicted of a felony, subject to certain domestic violence restraining orders, convicted of a misdemeanor crime of domestic violence, an unlawful user of controlled substances, or otherwise disqualified under 18 U.S.C. § 922.⁶ The ATF will deny any application where making or possessing the firearm would break the law.¹

State law matters too. Several states and the District of Columbia prohibit SBRs outright, including California, Hawaii, New Jersey, New York, and Rhode Island. Others impose additional restrictions beyond the federal process. Check your state’s rules before filing. The ATF will deny applications where state law forbids possession, and you’d be committing a state crime regardless.

Individual, Trust, or Entity

You can register an SBR in your own name, through an NFA gun trust, or through a corporation or LLC. Each option has trade-offs worth understanding before you file.

Individual registration is simplest. No trust to draft, no entity to maintain. The limitation is that nobody else can possess or use the SBR unless you’re physically present. Leaving a registered SBR in a safe your spouse can access while you’re away creates a legal problem, and this is what pushes many people toward a trust.

An NFA gun trust names co-trustees who can independently possess and use the SBR without you being there. Trusts also simplify inheritance: NFA items pass to trust beneficiaries without a new transfer application and background check. Since ATF Rule 41F took effect in 2016, every responsible person named on the trust must submit photographs, fingerprint cards, and pass a background check each time the trust files a new application.⁷ Five co-trustees means five sets of prints and five background checks per Form 1.

Corporate or LLC registration allows officers or members to access the SBR under the same shared-possession logic as a trust, with the same Rule 41F requirements for each responsible person. Corporations and LLCs also carry ongoing formalities that trusts typically avoid, such as annual filings, registered agents, and franchise taxes.

What Form 1 Requires

Have everything ready before you start. Incomplete submissions are the most common cause of delay because the ATF returns them.

Applicant and Firearm Details

The form asks for your full legal name, address, date of birth, and contact information. Filing through a trust or entity means providing the same information for every responsible person. For the firearm, you’ll need the manufacturer, model, caliber, and serial number of the existing receiver, along with the barrel length and overall length of the SBR as you plan to build it.⁸

Photographs and Fingerprints

Individual applicants need a 2×2-inch passport-style photograph taken within the past six months. Trust and entity applications need one from each responsible person. Every responsible person also completes two FBI FD-258 fingerprint cards, which can be rolled at a local police department, a UPS store, or another fingerprinting service. Expect roughly $30 to $50 per person for professional prints.⁸

CLEO Notification

Send a copy of your completed Form 1 to the chief law enforcement officer in your jurisdiction, usually the local police chief or county sheriff. This is notification, not a request for permission. The CLEO cannot block your application. You need proof you sent it, so use certified mail or another method with a receipt.⁷

How to Submit

The ATF eForms portal is the standard route. Create an account, complete the Form 1 electronically, upload your photograph, and digitally sign the application. After you submit electronically, you still have to mail the physical FD-258 fingerprint cards to the ATF’s NFA Division in Martinsburg, West Virginia. The ATF emails a confirmation once the electronic portion is in, but the application isn’t complete until the prints arrive.

Paper submissions are also accepted. You mail two copies of the completed Form 1 with all supporting documents. Paper applications currently process faster on average, roughly 20 days versus 36 days for eForms, though those numbers move with application volume.⁹

After Approval: Engraving and Assembly

You cannot build or assemble the SBR until your Form 1 is approved. Federal law is explicit that ATF approval must come before the making of the firearm.¹ Buying the parts is fine. Owning them separately is fine. Putting them together while the application is pending is a federal crime, with no allowance for being close to approval.

Once approved, you’ll receive the approved Form 1 by email if you filed through eForms. Before assembly, you must engrave identifying information on the frame or receiver: your name (or the trust’s name), the city and state where you’re making the SBR, and a serial number if the receiver doesn’t already have one. The engraving must be at least 0.003 inches deep with a minimum print size of 1/16 inch.¹⁰ Professional engraving generally runs $25 to $150 depending on method and placement.

Keep a copy of the approved Form 1 with the SBR whenever it’s in your possession. It’s your proof of registration if law enforcement asks. A digital copy on your phone works; a printed copy stored with the firearm is the safer choice.

Penalties for Getting It Wrong

Building or possessing an unregistered SBR is a federal felony. A violation of the NFA carries a fine of up to $10,000, imprisonment for up to ten years, or both.¹¹ The firearm is subject to seizure and forfeiture.¹² Intent isn’t a defense: accidentally creating an SBR by attaching a short barrel to a rifle receiver without an approved Form 1 exposes you to the same charges.

After the SBR Is Registered

Crossing state lines with a registered SBR requires advance written permission from the ATF. You file ATF Form 5320.20, specifying the firearm, destination, and dates. The ATF must approve the form before you travel; leaving first and filing later is a federal offense.¹³ This applies whether you’re moving, competing, or visiting a range. Submit the form to the NFA Division by mail, fax, or email to NFAFax@atf.gov. The approval covers a set window. If your trip runs longer, file a new one. The destination state also has to allow SBR possession; the ATF’s approval to transport doesn’t override a state ban.

You can change the barrel length, caliber, or upper receiver on a registered SBR without a new Form 1. No federal statute or regulation requires a fresh application for those swaps. The ATF does ask for written notification of permanent changes so the National Firearms Registration and Transfer Record stays accurate, and updating the registry before any future transfer matters if you plan to sell in a different configuration than what’s on file.

If you want to drop the SBR designation entirely, install a barrel of 16 inches or longer and confirm the overall length exceeds 26 inches. Once the firearm is no longer in an NFA configuration, send a letter to the ATF’s NFA Division asking that it be removed from the registry. After removal, it’s an ordinary Title I rifle and transfers without NFA paperwork.

1
Office of the Law Revision Counsel. 26 USC 5822 – Making
2
Office of the Law Revision Counsel. 26 USC 5845 – Definitions
3
Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Make and Register a Firearm – ATF Form 1 (5320.1)
4
Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Transfer and Register NFA Firearm ATF Form 5320.4
5
Office of the Law Revision Counsel. 26 USC 5821 – Making Tax
6
Office of the Law Revision Counsel. 18 USC 922 – Unlawful Acts
7
Bureau of Alcohol, Tobacco, Firearms and Explosives. Background Checks for Responsible Persons (Final Rule 41F)
8
Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Make and Register NFA Firearm ATF Form 5320.1
9
Bureau of Alcohol, Tobacco, Firearms and Explosives. Current Processing Times
10
eCFR. 27 CFR 479.102 – Identification of Firearms
11
Office of the Law Revision Counsel. 26 USC 5871 – Penalties
12
eCFR. 27 CFR 478.152 – Seizure and Forfeiture
13
Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Transport Interstate or to Temporarily Export Certain National Firearms Act (NFA) Firearms