Do You Still Need a Form 4 for a Suppressor or SBR? (4473 vs. eForm 4)

On October 9, 2026, ATF Director Robert Cekada issued an Open Letter to all FFLs and the public alongside updated NFA transfer guidance. Effective that date, the ATF suspended enforcement of prior-approval and mandatory registration requirements under the National Firearms Act (NFA) for the four firearm categories whose making and transfer taxes dropped to $0 on January 1, 2026: suppressors, short-barreled rifles (SBRs), short-barreled shotguns (SBSs), and "any other weapons" (AOWs).

In states where local law permits it, a dealer can now transfer a suppressor or SBR to an individual buyer on a standard Gun Control Act (GCA) Form 4473 with a NICS background check. At the same time, the ATF announced that it continues to maintain the National Firearms Registration and Transfer Record (NFRTR) and continues to process and approve eForm 4 and eForm 1 submissions on a voluntary basis at $0 tax.

For most applicants and FFL dealers, filing the $0 eForm 4 remains the only way to secure permanent statutory compliance. Buying or transferring an NFA item on a Form 4473 alone leaves the owner holding an unregistered firearm that the NFA statute still classifies as contraband, exposes buyers and dealers to felony statutes in roughly 30 states, prevents gun trust ownership, and cannot be registered later if a future administration reverses the DOJ's enforcement policy.

What the October 2026 ATF guidance actually changed (and what it did not)

The October 2026 policy shift is the result of three separate events, only the first of which was an act of Congress:

1. The $0 tax reduction (January 1, 2026). Under Public Law 119-21 (139 Stat. 72), Congress reduced the NFA making and transfer taxes in 26 U.S.C. §§ 5811 and 5821 from $200 (and $5 for AOW transfers) to $0 for suppressors, SBRs, SBSs, and AOWs (26 U.S.C. § 5845(e)). Congress did not repeal the NFA registration, prior-approval, or serialization statutes.
2. The Northern District of Texas injunction (August 5, 2026). A federal district court (No. 6:25-CV-056-H) enjoined the ATF from enforcing the NFA's registration and approval rules on those four untaxed categories, holding that because the NFA was enacted under Congress's taxing power, its registration mandates could not be constitutionally sustained once the tax reached $0. That injunction applied only to the plaintiffs in the litigation.
3. Nationwide enforcement discretion (October 9, 2026). Rather than appealing the district court order, the Department of Justice and the ATF exercised executive enforcement discretion to apply non-enforcement nationwide. In the October 9, 2026 Open Letter, the ATF announced it will no longer require individuals to seek prior approval on a Form 1 or Form 4 before making or transferring suppressors, SBRs, SBSs, or AOWs, and will no longer require those items to be registered in the NFRTR.

Just as important is what the October 9 Open Letter did not change:

• The National Firearms Act has not been repealed. All provisions of 26 U.S.C. Chapter 53 remain active federal statute. Under 26 U.S.C. §§ 5861(d) and 5871, possessing or transferring an NFA firearm that is not registered to the possessor in the NFRTR remains a federal felony carrying up to 10 years in prison and forfeiture of the item.
• The Gun Control Act (GCA) still applies in full. Under 18 U.S.C. § 921(a)(3), suppressors, SBRs, SBSs, and AOWs are statutory "firearms." Every commercial transfer still requires an FFL, a Form 4473, a NICS background check, and strict compliance with state and local law under 18 U.S.C. § 922(b)(2).
• Special Occupational Taxes (SOT) remain mandatory for dealers and manufacturers. The ATF guidance explicitly states that annual SOT obligations under 26 U.S.C. § 5801 for FFLs engaged in the business of manufacturing, importing, or dealing in NFA firearms remain in full force.
• Machine guns and destructive devices are unaffected. Both categories retain the $200 tax, mandatory NFRTR registration, and full eForm prior-approval requirements.

Enforcement discretion is not law, and there is no "register it later"

An executive enforcement policy is only as durable as the administration that issued it. In its Update to NFA Transfer Guidance, the ATF states this directly:

"The NFA treats unregistered firearms as contraband."

"Material changes in legal or factual circumstances could cause NFA enforcement to resume. For example, Congress could impose a new tax on NFA firearms, the district court's injunction could be dissolved or overturned, or the Department could rescind the enforcement guidelines."

The ATF identifies three distinct ways enforcement can return:

• A future administration or Attorney General rescinds the guidance. Because nationwide relief rests on DOJ enforcement discretion rather than legislation, a future administration, Attorney General, or ATF Director can withdraw the October 9 Open Letter at any time with an administrative memorandum. No vote in Congress and no court ruling is required.
• Congress restores a tax of any dollar amount. The 2025 budget reconciliation language setting the tax to $0 passed the House of Representatives by a four-vote margin (218–214). A future Congress can re-impose a $200 tax, or even a $1 nominal tax, through the same simple-majority reconciliation process. Because both the Texas injunction and the ATF policy apply exclusively to untaxed NFA items, restoring any tax immediately reactivates the constitutional taxing-power basis for mandatory registration.
• A higher court narrows or overturns the constitutional ruling.

Many buyers assume that if NFA enforcement resumes in the future, they will simply file a Form 1 or Form 4 at that time to register their 4473 suppressor or SBR. Federal law prohibits retroactive registration. As the ATF warns in its October 2026 FAQ:

"Federal law does not generally permit subsequent registration of unregistered NFA items nor are there provisions that would automatically grandfather unregistered NFA firearms."

Under 26 U.S.C. § 5812 and the ATF National Firearms Act Handbook (ATF P 5320.8, § 3.2.1), an NFA firearm can only be entered into the NFRTR prior to making (Form 1), by a qualified manufacturer upon manufacture (Form 2), or during a lawful transfer of an already-registered firearm (Form 3, Form 4, or Form 5). Once an item is transferred off-registry on a Form 4473, or made at home without a Form 1, there is no legal mechanism to register it later unless the Attorney General declares a formal amnesty under Public Law 90-618. The ATF explicitly notes that the Attorney General "is not required, however, to hold an amnesty or to provide forbearance." Only one NFA amnesty has ever been held, for 30 days in 1968.

Filing a voluntary eForm 4 or eForm 1 at acquisition costs $0 in federal tax and permanently records the firearm in the NFRTR. An item with an approved tax stamp complies with the text of 26 U.S.C. Chapter 53 regardless of which administration leads the Justice Department in four, eight, or twenty years.

The state-law trap: 29 states tie legality to federal registration

You do not have to wait for a future administration to face legal jeopardy over an unregistered NFA item. While federal agents have paused enforcement of NFRTR registration, state criminal codes in most of the country have not changed.

Across the 42 states where civilian NFA ownership is permitted, 29 states have criminal statutes that ban suppressors, SBRs, SBSs, or AOWs as illegal weapons—and then carve out an exemption or affirmative defense only when the item is registered under or possessed in compliance with the federal NFA. In its October 2026 guidance, the ATF explicitly disclaimed any state-law protection for items held under its non-enforcement policy:

"Most states require that individuals who possess NFA items comply with federal law or register them under the National Firearms Act. ATF cannot opine on whether holding an unregistered firearm or silencer pursuant to ATF's enforcement discretion will qualify for state-law purposes as lawfully held (or registered) under federal law."

State statutes that tether legality to federal law fall into two categories:

1. Strict "registered" or "tax stamp" statutes

In these states, the statutory exemption requires actual registration in the NFRTR, a federal tax stamp, or federal registration documentation. Because federal non-enforcement does not place an item in the NFRTR, an unregistered Form 4473 item fails the plain text of the state statute:

• Ohio (Ohio Rev. Code § 2923.17(C)(5)): Classifies suppressors, SBRs, and SBSs as felony "dangerous ordnance," exempting only "owners of dangerous ordnance registered in the national firearms registration and transfer record."
• Wisconsin (Wis. Stat. § 941.298(3)(c)): Makes suppressor possession a Class H felony unless the possessor "complied with the licensing and registration requirements under 26 USC 5801 to 5872."
• Georgia (O.C.G.A. § 16-11-124(4)): Exempts suppressors and short-barreled firearms only when registered "in accordance with the dictates of the National Firearms Act."
• Montana (Mont. Code Ann. § 45-8-340(3)(f)): Exempts SBRs and SBSs only when the owner possesses a "valid federal tax stamp."
• Explicit federal registration requirements also govern one or more NFA categories in Alaska (AS § 11.61.200(c)), Louisiana (La. R.S. § 40:1785), Maryland (Md. Code, Pub. Safety § 5-203(a)(2) for SBRs/SBSs), Michigan (MCL § 750.224b(5) for SBRs/SBSs), Nevada (NRS § 202.275(3)(b) for SBRs/SBSs), Oregon (ORS § 166.272(3)), South Dakota (SDCL § 22-14-6(1) for SBSs), and Washington (RCW § 9.41.250(1)(c) for suppressors), while Colorado (C.R.S. § 18-12-102(5)) requires a "valid permit and license" satisfied in practice only by an approved NFA tax stamp.

2. "In compliance with federal law" or NFA statutes

States including Alabama (Ala. Code § 13A-11-63 for SBRs/SBSs), Arizona (A.R.S. § 13-3101(B)), Connecticut (Conn. Gen. Stat. § 53a-211(b) for suppressors/SBSs), Florida (Fla. Stat. § 790.221(3) for SBRs/SBSs), Iowa (Iowa Code §§ 724.1B, 724.1C), Minnesota (Minn. Stat. § 609.66 Subd. 1a(a)(1) for suppressors), Mississippi (Miss. Code Ann. § 97-37-31 for suppressors), Missouri (RSMo § 571.020.1(6)), Nebraska (Neb. Rev. Stat. § 28-1203(2) for SBRs/SBSs), North Carolina (N.C. Gen. Stat. § 14-288.8(b)(5)), North Dakota (N.D.C.C. §§ 62.1-05-01, 62.1-02-03), Oklahoma (21 O.S. § 1289.18(D) for SBRs/SBSs), Pennsylvania (18 Pa.C.S. § 908(b)(1)), South Carolina (S.C. Code Ann. § 16-23-250 for SBRs/SBSs), and Virginia (Va. Code Ann. § 18.2-303.1 for SBRs/SBSs) prohibit some or all NFA items unless they are "lawfully possessed under federal law," "authorized under federal law," or possessed "in compliance with the National Firearms Act." Because Congress has not repealed 26 U.S.C. § 5861 and the ATF still describes unregistered NFA items as statutory contraband, possessing an unregistered 4473 item in these jurisdictions leaves the owner at the mercy of how a local prosecutor or state judge interprets federal enforcement discretion.

In fact, Kansas lawmakers recognized this exact state-law trap earlier in 2026 and passed Senate Substitute for HB 2501 (effective July 1, 2026) to repeal the NFA tie in K.S.A. § 21-6301 for suppressors and SBSs. Including Kansas, only 13 states (Arkansas, Idaho, Indiana, Kansas, Kentucky, Maine, New Hampshire, New Mexico, Tennessee, Texas, Utah, West Virginia, and Wyoming) have no state statute tying suppressors, SBRs, or SBSs to federal registration or NFA compliance. In the other 29 NFA-permitting states, an approved eForm 4 or eForm 1 remains the only clear statutory shield for at least one NFA category.

Why FFL dealers still need eForm 4 and EFT workflows

Some FFL/SOT dealers reacted to the October 9, 2026 headline by assuming eForm 4 transfers and EFT fingerprint files were obsolete. For a gun shop, dropping eForm capability creates both a compliance hazard and a lost-revenue problem:

1. Federal license risk under 18 U.S.C. § 922(b)(2). The ATF's October 9 Open Letter explicitly warns dealers that "The GCA also continues to prohibit federal firearm licensees from transferring statutory firearms in violation of state or local law. 18 U.S.C. § 922(b)(2)." In any of the 29 states that tie suppressor, SBR, SBS, or AOW legality to federal registration or NFA compliance, transferring that item on a Form 4473 without an approved Form 4 violates state law—which automatically makes the transaction a federal GCA violation by the dealer. An Industry Operations Investigator (IOI) audit can cite an FFL for transferring an unregistered NFA item in a registration-tied state.
2. NFA gun trusts cannot buy on a Form 4473 alone. A Form 4473 transfers a firearm to a single natural person. Any customer acquiring an item through an NFA gun trust so spouses, adult children, or co-trustees can lawfully possess it must file an eForm 4 with an EFT fingerprint file and Form 5320.23 Responsible Person Questionnaire (RPQ) for every responsible person.
3. Informed buyers in untied states are still choosing the $0 eForm 4. Even in the 13 untied states, major national NFA distributors and firearms attorneys are advising customers to file the voluntary $0 eForm 4 rather than taking an unregistered 4473 transfer. According to ATF's August 2026 processing data, individual eForm 4 approvals averaged 6 days and trust approvals averaged 20 days. Customers spending $800 to $1,500 on a suppressor or SBR routinely prefer a 6-day wait for a permanent, 42-state-legal registration over walking out the same day with an item that cannot cross into registration-tied states and could become un-registrable contraband after the next election.
4. Already-registered inventory, eForm 1 builders, and machine guns still require EFT files. Customers filing an eForm 1 to register an SBR before interstate travel, private sellers transferring already-registered NFRTR items on a $0 Form 4, and buyers of machine guns or destructive devices all require EBTS-compliant EFT files.

Gun trusts, shared possession, and estate planning (Form 5)

A Form 4473 transfer only puts the firearm in the name of one individual buyer. For NFA owners who use a gun trust, or who plan to share or pass down their items, skipping the eForm 4 creates three structural problems:

• Co-trustee sharing (26 U.S.C. § 5845(j)). Under the NFA, the statutory definition of "transfer" includes loaning, giving, or otherwise disposing of a firearm to another person. When an item is registered to a gun trust on an eForm 4, every co-trustee named as a responsible person has independent statutory authority to possess, transport, and use the suppressor or SBR without the settlor present. If an item is acquired by an individual on a Form 4473 and federal enforcement resumes, letting a spouse or adult child take that suppressor to the range alone reverts to an unapproved felony transfer.
• Inheritance and ATF Form 5. When the owner of a registered NFA item dies, the executor transfers the item to a lawful heir tax-exempt on an ATF eForm 5 (which averaged 1 day for approval in August 2026), or the item remains seamlessly inside a gun trust for successor trustees and beneficiaries without probate. By contrast, Chapter 9 of the ATF NFA Handbook states that unregistered NFA firearms found in a decedent's estate are contraband that cannot be registered by an executor or transferred via Form 5. If enforcement resumes during the owner's lifetime, a 4473-only suppressor has no lawful estate transfer path.
• Do not de-register existing trust items. The ATF allows owners to request removal of an item from the NFRTR, but explicitly warns in its October 2026 guidance that once an item is removed, "it cannot be re-registered unless the Attorney General declares an amnesty." Removing an already-registered item from a trust trades permanent statutory protection for a revocable policy.

Interstate travel, Form 20, warranty repairs, and resale

What happens after the purchase is where the gap between a registered eForm 4 item and an unregistered Form 4473 item becomes widest:

• SBRs and SBSs still require ATF Form 20 (18 U.S.C. § 922(a)(4)). The requirement to obtain prior ATF authorization on a Form 5320.20 before transporting a short-barreled rifle or short-barreled shotgun across state lines sits in the Gun Control Act (18 U.S.C. § 922(a)(4)), not the NFA tax code. The ATF's October 2026 FAQ explicitly confirms that individuals "must continue to file a Form 20 before engaging in interstate transportation of a short-barreled rifle or short-barreled shotgun, even if it is unregistered."
• Interstate travel safe harbor (18 U.S.C. § 926A) and out-of-state hunting. While the ATF stated it is not currently enforcing 26 U.S.C. § 5861(j) (interstate transport of an unregistered NFA firearm), the October 9 Open Letter warns that "it is unclear whether state courts will apply the safe harbor created by 18 U.S.C. § 926A to interstate transportation of unregistered NFA items. Consequently, individuals should exercise caution before transporting unregistered NFA items through states in which such items are prohibited by law." Driving with an unregistered 4473 suppressor or SBR into or through any of the 29 registration-tied states for a hunt, competition, or relocation exposes the traveler to state felony charges, and several state hunting codes explicitly require suppressors used afield to be federally registered.
• Warranty repairs. Several suppressor manufacturers require an approved Form 4 before accepting an item for warranty service so the manufacturer is not left holding unregistered inventory if DOJ enforcement guidelines change while the item is in the factory.
• Resale and trade-ins. An item registered in the NFRTR transfers cleanly to a future buyer on a $0 Form 4. Selling an already-registered item without a Form 4 leaves the firearm registered to the original owner in federal records while someone else possesses it (26 U.S.C. § 5861(b), (d), (e)). Conversely, many FFLs refuse to take unregistered 4473 suppressors on trade or consignment because they cannot be sold to trust buyers or into registration-tied states.
• Tax-record privacy (26 U.S.C. § 6103). Some buyers consider a Form 4473 transfer to avoid the federal registry. However, NFRTR records are classified as confidential tax return information under 26 U.S.C. § 6103, which strictly prohibits the ATF from disclosing registration data outside narrow statutory exceptions. Moreover, any applicant who already owns a registered suppressor or SBR is already in the NFRTR; skipping the Form 4 on a subsequent purchase simply leaves that new item without statutory protection.

Comparison: Form 4473 only vs. voluntary eForm 4

Factor	Form 4473 Only (Unregistered)	Voluntary eForm 4 (Registered)
Federal transfer tax	$0	$0 (for suppressors, SBRs, SBSs, and AOWs)
Statutory status (26 U.S.C. ch. 53)	Unregistered contraband under statute; protected only while current DOJ enforcement discretion lasts	Registered in the NFRTR; complies with the NFA statute regardless of administration
Approval wait time	Same day (subject to NICS delays and state waiting periods)	Averaged 6 days (individual) and 20 days (trust) in Aug. 2026 ATF data
State-law legality	Legal across all NFA categories in only 13 untied states; felony risk in up to 29 registration-tied states	Legal in all 42 states where NFA items are permitted
FFL compliance (18 U.S.C. § 922(b)(2))	Violates GCA if transferred in a state whose statute requires federal registration	Satisfies both federal and state transfer requirements
If a future administration reverses policy	Cannot be registered after the fact outside a formal amnesty	Already registered; unaffected by policy reversals
NFA gun trust ownership & sharing	No (transfers to a single individual only)	Yes (co-trustees have independent statutory possession authority)
Interstate travel & moving	Exposed to state felony charges in registration-tied states; 18 U.S.C. § 926A safe harbor uncertain	Permitted across all 42 NFA-legal states (Form 20 still required for SBRs/SBSs)
Estate & inheritance transfer	No Form 5 path if enforcement resumes	Tax-exempt Form 5 transfer or continuous trust ownership

Common questions

Did the ATF repeal the National Firearms Act?

No. Only Congress can repeal a federal statute. On October 9, 2026, the ATF exercised executive enforcement discretion to stop requiring prior approval and NFRTR registration for $0-tax NFA items (suppressors, SBRs, SBSs, and AOWs). The underlying felony statutes in 26 U.S.C. Chapter 53 remain on the books, and the ATF explicitly warns that enforcement can resume if the Department of Justice rescinds its guidance, a court modifies the August 2026 injunction, or Congress enacts a new tax.

If I buy a suppressor or SBR on a Form 4473 today, can I register it on a Form 4 later if the rules change?

No. The ATF's October 2026 guidance states that federal law "does not generally permit subsequent registration of unregistered NFA items nor are there provisions that would automatically grandfather unregistered NFA firearms." Outside of a formal amnesty declared by the Attorney General (which has not happened since 1968), an item transferred unregistered on a Form 4473 cannot be added to the NFRTR later.

Can I buy a suppressor for my gun trust on a Form 4473 without an eForm 4?

No. A Form 4473 transfers a firearm to a single individual. To register an NFA item to a gun trust so that co-trustees can lawfully share possession and successor trustees can inherit it without probate, the transfer must be submitted on an eForm 4 with an EFT fingerprint file and Form 5320.23 for each responsible person.

Why do FFL dealers still need to file eForm 4s and generate EFT files?

Under 18 U.S.C. § 922(b)(2), an FFL is prohibited from transferring a firearm or suppressor if the buyer's possession would violate state or local law. Because 29 states tie the legality of suppressors, SBRs, or SBSs to federal NFA registration or compliance, transferring an unregistered item on a Form 4473 in those states violates state law and puts the dealer's license at risk. Even in untied states, trust buyers and customers who want permanent statutory protection continue to request voluntary $0 eForm 4 filings.

Do I still need an ATF Form 20 to take an SBR across state lines?

Yes. The interstate transport approval requirement for short-barreled rifles and short-barreled shotguns sits in the Gun Control Act (18 U.S.C. § 922(a)(4)), not the NFA tax code. The ATF's October 2026 guidance confirms that owners must still obtain an approved Form 20 before transporting an SBR or SBS across state lines, whether the firearm is registered or unregistered.