Suppressors in 2026: $0 Tax, and No Form 4 Since October 9

What changed on October 9

ATF stopped enforcing the National Firearms Act's approval and registration requirements for suppressors, nationwide. The same goes for short barreled rifles, short barreled shotguns and AOWs.

In practice a dealer can now sell you a suppressor on a Form 4473 and a background check, the same as a rifle. No Form 4, no wait for approval, no registration. If you make one, you don't need a Form 1 either.

It got here in three steps. The One Big Beautiful Bill Act cut the $200 tax to $0 from 1 January 2026. In August, a federal court in Texas ruled in Silencer Shop Foundation v. ATF that once the tax hit $0, registration went beyond Congress's taxing power, but the order only covered the plaintiffs' members and customers. The Justice Department didn't appeal, and on October 9 it applied the same treatment to everyone.

What did not change

A Form 4473 and a background check are still required whenever you buy through a dealer. Prohibited people still can't own one, and dealers still sell only to residents of their own state.

Machine guns and destructive devices are untouched. They keep the $200 tax and the full NFA process.

Anyone telling you suppressors are now unregulated has misread it. They're unregistered, not unregulated.

Registering is optional, not gone

ATF still accepts a Form 4 or Form 1 for a suppressor, at $0, and still keeps the registry. There are two reasons you might file one anyway.

1. Your state. About 15 states, by NSSF's count, only allow suppressors that are registered or held in line with federal law. ATF has said it can't tell you whether an unregistered can counts. In those states the Form 4 is still the safe route.
2. The policy can be reversed. ATF changed what it enforces, not the law. Congress could bring back a tax, a court could overturn the ruling, or the Justice Department could rescind its guidance. Unregistered suppressors wouldn't be grandfathered, and the law generally doesn't allow registering one after the fact unless the Attorney General declares an amnesty.

And then there is state law

Some states still ban suppressors outright, among them California, Hawaii, Illinois, Massachusetts, New Jersey and New York.

Elsewhere, an unregistered can is a real legal question in the states commonly described as tying legality to federal registration. As of our latest check they include Alaska, Colorado, Connecticut, Georgia, Michigan, Mississippi, Montana, Nevada, North Carolina, North Dakota, Ohio, Oregon, Pennsylvania, Washington and Wisconsin.

There are still three layers, and you have to clear all three:

1. The tax. Zero, for everyone.
2. The federal paperwork. Form 4473 through a dealer. Form 4 optional.
3. Your state. Which may want a registered can, and may ban suppressors entirely.

What to do in practice

Ask your dealer what they recommend. We would. Some will keep running Form 4s for buyers in registration states, and they carry the compliance obligation.

Register if your state ties legality to federal law, or if you'd rather not bet on the policy lasting.

Be careful travelling. ATF won't enforce the federal ban on moving an unregistered suppressor across state lines, so you don't need its approval. A state that bans suppressors still bans yours, so don't drive through one with it in the car. SBRs are different: they still need ATF approval on Form 5320.20 before they cross a state line.

Why this is so confusing

Four things changed in one year, from four different places. Congress removed the tax. A court blocked registration for some buyers. The Justice Department extended that to everyone. States kept their own rules, untouched by any of it.

Headlines will collapse that into "suppressors are legal now." Federally, buying one got about as simple as buying a rifle. Whether you can own one, and whether you should register it, still depends on where you live. Anything you read about this, including this guide, has a shelf life, and we'll update it when the picture moves.

What this means for building

If the tax was what stopped you, that barrier is gone, and so is the wait. We'd revisit a suppressed build now. Our AR-15 suppressor guide covers what builders actually choose.

Plan for the rifle, not only the can. A suppressor raises back pressure, which pushes the system toward overgassed and drives more gas and fouling into the receiver. An adjustable gas block is close to essential, and our DI versus piston guide covers why that costs less than changing operating system.

If you are building short and suppressed, 300 Blackout is the cartridge designed for exactly that.

The short version

The tax is zero and the Form 4 is optional, for everyone, as of October 9, 2026. Your state may still want a registered can or may ban them, and the policy can be reversed, so we'd still register in a registration state. Ask your dealer which route makes sense for you.