Do You Still Need a Form 4 or Tax Stamp for a Suppressor? What Changed in 2026

If you have looked at suppressors before, you know the old routine: pay a federal tax, file a Form 4, wait for approval, then pick it up. That routine changed this year. Here is what changed, in order, and what your dealer still does. You can see suppressor listings on Gun Search Engine while you read.

Per ATF guidance as of October 2026; rules may change. Check your state and local rules with your local dealer before you buy.

The timeline at the top has the dates. The official documents are in the Sources list at the end of this post.

What changed, in order

• The tax went to zero. Congress cut the federal tax on making or transferring a suppressor to zero dollars.
• A court ruled against the old paperwork. With no tax left to collect, a federal court ruled that the federal approval and registration rules could not be enforced for suppressors against the people in that case.
• The government did not appeal. The Justice Department told Congress it would not appeal, and the window to appeal closed.
• ATF extended it to everyone. ATF then said it will stop enforcing the federal approval, registration and tax stamp steps for suppressors nationwide, not only for the people in the lawsuit.

“The zero-dollar tax was step one. Dropping federal approval and registration was step two.”

What you still do

A suppressor is still a firearm under federal law. The normal rules for getting a gun from a dealer still apply.

• Go through a licensed dealer in your home state. With limited exceptions, a dealer can only sell to residents of the dealer's state.
• Fill out the background check form and pass the check. It is the same federal form and instant check you would do for a rifle or a pistol.
• Follow your state and local laws. A dealer cannot sell you a suppressor if your state or city bans it.

Dealers who sell suppressors also still need the federal license and the special tax status that lets them deal in these items. That part did not change.

“The federal approval wait is gone for now. The background check is not.”

When a Form 4 still matters

• States that want federal registration. Some states only allow suppressors that are registered under federal law. If you live in one, your dealer can help you file a Form 4 so you stay legal under state law.
• Owners who want the paperwork. ATF still accepts and approves Form 4 filings from anyone who chooses to file. Some owners want the registration in case the rules change.
• Machine guns. They still carry the federal tax and the full federal process. Nothing here changes that.

If you do file, ATF posts its current processing times on its website. The link is in the Sources list below.

Could this change?

Yes. Right now ATF is choosing not to enforce parts of the law after a court ruling. That is a policy choice, not a new law, and it can be withdrawn. Other courts could also see the question differently, and state laws can change too.

If you are on the fence, talk to your dealer. They keep up with rule changes and know what applies where you live.

Per ATF guidance as of October 2026; rules may change. For the full walkthrough, read our suppressor buying guide, or browse suppressor listings to see which dealers carry them.