How to Transfer a Suppressor to a Trust With Form 4: CLEO and Timeline

To transfer a suppressor to a trust with Form 4, you file ATF Form 4 naming yourself as the individual transferor and your NFA gun trust as the transferee, submit fingerprints, a photograph, and a Responsible Person Questionnaire for every responsible person, send a copy to your local Chief Law Enforcement Officer, and wait for approval. As of January 1, 2026, the federal transfer tax on suppressors is $0, so the only real costs are fingerprinting and your time.¹

The regulatory process is unchanged from prior years. What’s different is that the $200 stamp that once made owners hesitate to restructure a suppressor they already owned is gone. The $200 rate now applies only to machine guns and destructive devices; every other NFA item, including suppressors, short-barreled rifles, and short-barreled shotguns, transfers at $0.¹

Confirm Your State Allows This

Suppressors are legal in 42 states. Eight states and the District of Columbia ban them outright: California, Delaware, Hawaii, Illinois, Massachusetts, New Jersey, New York, and Rhode Island. If you live in one of those, no ATF paperwork will make trust ownership legal. Even in permissive states, some jurisdictions add registration requirements or use restrictions, so check state and local law before you file.

What You Need Before You File

A Valid Trust

You need a completed, signed NFA gun trust in place before Form 4 can list it as the transferee. Most states require the trust to be signed in front of a notary with two witnesses who are not beneficiaries. An improperly executed trust will get the application rejected. If you already have a trust holding other NFA items, the same trust works, provided it hasn’t lapsed or been revoked.

Suppressor Details

Pull the approved Form 4 from your original purchase. You’ll need the manufacturer, model, serial number, caliber, barrel length, and overall length. Transcribe every character exactly. A single wrong digit on the serial number will delay or kill the application.

Responsible Person Information

Every responsible person named in the trust has to submit ATF Form 5320.23, the Responsible Person Questionnaire. A responsible person is anyone with authority to direct the trust’s management or policies over its firearms — generally the settlor, all trustees, and any beneficiary with power to possess or transfer trust property.² For each one you’ll need full legal name, current address, date and place of birth, and Social Security Number.

Fingerprints and a Photograph

Each responsible person submits two completed FBI FD-258 fingerprint cards. Blank cards are available from your local ATF field office, the ATF Distribution Center, or a commercial fingerprinting service. A professional service typically runs $30 to $40 per person. If you file through eForms, you may upload electronic fingerprints in EFT format conforming to FBI specification 8.1.0, up to 12 MB, instead of mailing paper cards.³

Each responsible person also needs one passport-style photograph: 2×2 inches, frontal view, taken within the past six months, on a plain white or off-white background.⁴

Filing Form 4

On the form, you are the transferor (as the individual owner) and your trust is the transferee. No FFL dealer is involved. Because this isn’t a commercial sale, you handle both sides of the paperwork yourself.

Paper

Mail two completed copies of Form 4 to the NFA Division at the address printed on the form, along with, for each responsible person: two FD-258 fingerprint cards, one passport photograph, and a completed Form 5320.23. Include a full, unredacted copy of the trust document with all schedules and amendments.⁴

eForms

The ATF eForms portal walks you through Form 4 online, accepts trust documents and photographs as uploads, and takes electronic fingerprints if you have EFT files. Review every entry and attachment before final submission. eForms historically processed faster than paper, though the gap has narrowed.

Notify Your CLEO

After you submit to the ATF, separately notify the Chief Law Enforcement Officer for the jurisdiction where each responsible person lives. The CLEO is typically the local chief of police, county sheriff, head of the state police, or a local district attorney. Send a copy of the completed Form 4 and each responsible person’s Form 5320.23 to the appropriate CLEO.⁴

This is notification, not permission. The CLEO doesn’t sign or approve anything. Skip it and you can jeopardize the application.

How Long Approval Takes

As of February 2026, the ATF reports average processing times of 26 days for Form 4 trust applications through eForms and 24 days on paper.⁵ Those are averages for finalized applications and fluctuate with volume. An application flagged for additional review will take longer. Check the ATF’s processing times page before setting expectations.

After the ATF Approves

Once Form 4 is approved, the suppressor’s registration officially moves from you as an individual to the trust. You’re both the transferor and a trustee of the receiving trust, so there’s no dealer pickup. The item is already in your hands. What changes is the legal owner of record.

Store the approved Form 4 with the tax stamp somewhere secure. That document is the trust’s proof of legal ownership. Keep a copy with the trust itself, and consider a digital backup. Federal law doesn’t require you to carry the Form 4 in the field, but having a copy accessible avoids trouble if law enforcement asks.

Who Can Now Possess It

Every co-trustee listed as a responsible person can independently possess and use the suppressor without you present. That is the practical point of the whole exercise. Co-trustees must be at least 18 and cannot be prohibited persons under federal law. If a trustee becomes prohibited through a felony conviction, a domestic violence restraining order, or any other disqualifying event, remove them from the trust immediately. A prohibited person in possession of an NFA item commits a federal crime, whatever the trust paperwork says.

Storage

Federal law treats any situation where an unauthorized person can reach a trust-owned suppressor as a potential unlawful transfer. If the suppressor is stored somewhere shared, only authorized trustees can hold the key or combination. A locked safe at a friend’s house is fine if the friend cannot open it. An unlocked closet a non-trustee roommate could reach into is not.

Interstate Travel

Suppressors, unlike machine guns, short-barreled rifles, short-barreled shotguns, and destructive devices, do not require prior ATF authorization to cross state lines. You do not need to file ATF Form 5320.20 to travel with one.⁶ State law is a separate matter. Driving a suppressor into a ban state is a state felony the moment you cross the line, regardless of what the ATF says.

Keeping the Trust Current

Approval isn’t the end of the paperwork. Adding a trustee doesn’t require a new Form 4 for items already registered, but the next NFA application filed through the trust will require fingerprints, a photograph, and Form 5320.23 from the new person. Removing a trustee generally requires a trust amendment, often notarized. Review the trust periodically to confirm it remains valid under your state’s trust law and that every responsible person still qualifies to possess firearms.

1
Office of the Law Revision Counsel. 26 USC 5811 – Transfer Tax
2
Bureau of Alcohol, Tobacco, Firearms and Explosives. Background Checks for Responsible Persons (Final Rule 41F)
3
Bureau of Alcohol, Tobacco, Firearms and Explosives. Final Rule 2021R-08F NFA Form One Submission External Guidance With QA
4
Bureau of Alcohol, Tobacco, Firearms, and Explosives. Application to Transfer and Register NFA Firearm (Tax-Paid) – ATF Form 5320.4
5
Bureau of Alcohol, Tobacco, Firearms and Explosives. Current Processing Times
6
Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Transport Interstate or to Temporarily Export Certain National Firearms Act (NFA) Firearms – ATF Form 5320.20