How to Apply for a Silencer: ATF Form 4, CLEO, and Pickup

To apply for a silencer, you file ATF Form 4 through a licensed NFA dealer, pay a one-time $200 federal transfer tax, pass an FBI background check, and wait for the ATF to issue your tax stamp before the dealer can hand the silencer over. As of February 2026, individual eForm 4 applications are averaging about 10 days from submission to approval, a sharp change from the year-plus waits that were common before electronic filing.¹ The steps themselves are not complicated, but every one of them matters. Taking possession before approval is a federal felony.

Who Can Apply

You have to be at least 21 to buy a silencer from a dealer. Federal law lets dealers sell rifles and shotguns to buyers 18 or older, but everything else, silencers included, requires 21.² You also have to be someone the federal government allows to possess a firearm. The disqualifiers are the same ones that apply to any gun purchase:

A felony conviction, meaning any crime punishable by more than a year in prison
A misdemeanor domestic violence conviction, or an active restraining order involving an intimate partner or child
Unlawful use of or addiction to a controlled substance
Involuntary commitment or an adjudication of mental incompetence
Dishonorable discharge, renounced U.S. citizenship, fugitive status, or unlawful immigration status

Any of those and your application will be denied.²

State law is the other gate. Civilian silencer ownership is banned in California, Delaware, Hawaii, Illinois, Massachusetts, New Jersey, New York, Rhode Island, and the District of Columbia. The other 42 states allow it, though some layer their own registration rules on top of the federal process. Check yours before you spend any money.

Choosing How to Register

Before you file anything, decide whose name the silencer will be in. That decision affects who can legally touch it after approval, so it is worth settling first.

As an individual. You alone can possess and transport the silencer. Someone else can shoot with it at the range if you are physically present, but they cannot take it, borrow it, or store it. Paperwork is minimal: your information, a photo, and fingerprints.

Through an NFA trust. A trust lets you name additional trustees, each of whom can possess and use the silencer independently. This is the popular choice for buyers who want a spouse or shooting partner to have full access. The tradeoff is that every trustee counted as a “responsible person” has to submit their own photo, prints, and background check with the application.³ Online services set up NFA trusts for roughly $25 to $150; a firearms attorney will cost more.

Through a corporation or LLC. An entity can register a silencer with its officers or authorized members as possessors. In practice this route is mostly used by ranges, training facilities, and other businesses rather than by individual buyers. Every responsible person still submits prints and a photo.

Finding a Dealer and Picking the Silencer

Silencers can only be transferred through a Federal Firearms Licensee that also holds a Special Occupational Tax status authorizing NFA items. That is a specific category, often called a Class 3 SOT dealer, and not every gun shop qualifies.

The dealer runs the whole transaction. They receive the silencer from the manufacturer, hold it while your Form 4 is pending, and release it to you after approval. Ask whether they have a digital fingerprint kiosk (this alone can shave weeks off the process), whether they help fill out the paperwork, and how they keep you posted on status. Transfer fees on NFA items typically run $15 to $200 on top of the silencer’s price.

On the silencer itself, match the caliber to what you plan to shoot. A .30-caliber can typically handle .308 and 5.56mm rifles; a .45-caliber covers most common handgun rounds. Your dealer can walk you through mounting options and compatibility.

Filing ATF Form 4

ATF Form 5320.4, known as Form 4, is the application that asks the ATF to approve the transfer of the silencer from the dealer to you and register it in the National Firearms Registration and Transfer Record.⁴ It captures your information, the dealer’s information, and the exact silencer being transferred.

What You Have To Include

A 2-by-2-inch photograph of each applicant or responsible person, taken within the last six months
FBI Form FD-258 fingerprint cards for each applicant or responsible person
If you are using a trust, the trust document itself; if a corporation, formation documents identifying responsible persons

The prints and photo requirements are set by statute: federal law requires anyone receiving an NFA firearm to be identified through fingerprints and a photograph.⁵

Notifying Your Chief Law Enforcement Officer

When you submit Form 4 to the ATF, you also send a copy to your local chief law enforcement officer. That is usually your city’s chief of police, the county sheriff, the head of state police, or a local district attorney. If you are applying through a trust or corporation, each responsible person has to send their completed ATF Form 5320.23 (Responsible Person Questionnaire) to their own CLEO.³ The CLEO does not approve or sign anything. It is purely a notice. But you certify on the form that you sent it, and skipping the step can sink the application.

eForms or Paper

You can file Form 4 electronically through the ATF’s eForms system or on paper. Almost everyone files electronically now, and for good reason. With eForms, you or your dealer enter the information online, a fingerprint kiosk (if the dealer has one) uploads your prints directly to the ATF, your photo is attached digitally, and the $200 tax is paid by card through pay.gov at submission.³

Paper filings go to the NFA Division by mail with two completed forms, photos, fingerprint cards, and a $200 check or money order. Use a trackable service if you go that route. Expect the wait to be significantly longer than eForms.

What Happens After You File

Once the ATF has your application, it runs a background check through the FBI’s National Instant Criminal Background Check System, looking at criminal history, mental health records, and the other disqualifying categories.⁶

Recent wait times reflect the shift to electronic filing. For applications finalized in February 2026, individual eForm 4 filings averaged 10 days with a median of 12; trust eForm 4 filings averaged 26 days.¹ Those numbers move with ATF workload, so check the current processing times page before you plan around them.

If the application is approved, the ATF issues the tax stamp and sends the approved Form 4 back to your dealer. If it is denied, you will get a letter from the NFA Division explaining why. When a denial rests on a NICS background check result you believe is wrong, you can file a Firearm Related Challenge through the FBI. The denial letter includes the NICS Transaction Number you need to open that challenge.⁷ That process contests the accuracy of the underlying background check, not the ATF’s decision itself.

Picking It Up

After approval, the dealer contacts you to schedule pickup. You fill out ATF Form 4473, the same form used for any retail firearm sale, and the dealer runs one final NICS check. Assuming it clears, you walk out with the silencer.⁸

The stamped Form 4 is your proof of registration. Store the original somewhere safe and keep a copy, digital or paper, with the silencer whenever you take it anywhere. If a law enforcement officer asks to see the registration, you want to be able to produce it right then.

What You Should Expect To Spend

The $200 tax gets the attention, but it is one line in a bigger budget. That tax has been $200 since the National Firearms Act was enacted in 1934.⁹ The rest:

The silencer: roughly $200 for budget rimfire models up to $1,500 or more for premium rifle suppressors
Dealer transfer fee if you bought elsewhere: $15 to $200
NFA trust setup: $25 to $150 online, more with an attorney
Fingerprinting: free to about $50, depending on whether your dealer’s kiosk handles it
Passport photo: $10 to $20 if your dealer does not provide it

A first-time buyer registering through a trust and getting a mid-range silencer should plan on something in the $700 to $2,000 range all in.

Possession, Travel, and Storage

How you registered the silencer dictates who can handle it. An individual registration means you are the sole possessor. Others can shoot with it if you are there, but they cannot store, transport, or borrow it. A trust flips that: any named trustee can possess and use it on their own.

Silencers do not require you to file ATF Form 5320.20 to cross state lines, unlike short-barreled rifles and some other NFA items. You can travel with your silencer into any state where it is legal without notifying the ATF. If your route passes through a state that bans them, federal law lets you transit as long as the silencer is locked in a case and not readily accessible, meaning something like a trunk or a locked container.

Storing the silencer when you are away depends again on registration. Trust owners can leave it with another trustee. Individual owners are more constrained: the ATF allows storage in a bank safe deposit box, or in a safe or locked container at a friend or relative’s home, but only if you hold the sole key and no one else can get in. Leaving a copy of your registration paperwork and a written note authorizing the storage location is a sensible precaution.

Do Not Take Possession Before Approval

Possessing a silencer that is not registered in the National Firearms Registration and Transfer Record is a federal felony carrying up to 10 years in prison and a fine of up to $10,000.¹⁰ That applies whether the silencer was homemade, bought outside the Form 4 process, or simply taken home before the stamp came back. There is no good-faith exception. Wait for the approval.

1
Bureau of Alcohol, Tobacco, Firearms and Explosives. Current Processing Times
2
Office of the Law Revision Counsel. 18 USC 922 Unlawful Acts
3
Bureau of Alcohol, Tobacco, Firearms and Explosives. Application to Transfer and Register NFA Firearm (Tax-Paid)
4
Bureau of Alcohol, Tobacco, Firearms and Explosives. Application for Tax Paid Transfer and Registration of Firearm – ATF Form 4 (5320.4)
5
Office of the Law Revision Counsel. 26 USC 5812 Transfers
6
Federal Bureau of Investigation. About NICS
7
Bureau of Alcohol, Tobacco, Firearms and Explosives. ATF and FBI Formalize Appeals Process for Certain National Firearms Act Applicants
8
Federal Bureau of Investigation. Firearms Checks (NICS)
9
Bureau of Alcohol, Tobacco, Firearms and Explosives. National Firearms Act (NFA)
10
Office of the Law Revision Counsel. 26 USC 5871 Penalties