State SBR law

Are short-barreled rifles legal in Missouri? (2026)

By Cole Harlan, EditorUpdated Oct 28, 2026How we verifyEditorial standards

Missouri doesn't ban SBRs outright. RSMo 571.020 makes it a class D felony to possess, make, transport, repair or sell one only when that is in violation of federal law. A federally lawful SBR is not an offense under this section. What that means for an SBR left unregistered after ATF's October 9, 2026 change has not been tested.

Not legal advice. This page summarizes Missouri statutes and federal guidance as of the date above. Local rules and your own circumstances can matter. Check with your dealer or a Missouri attorney if you're unsure.

The short answer

The offense is tied to federal law. RSMo 571.020.1(6)(b) covers a short-barreled rifle or shotgun only when the conduct is in violation of federal law.
Penalty: class D felony under subsection 3.
No registration language. The section never mentions NFA registration. It asks only whether federal law is being violated.
Open question: how that test applies to an SBR not registered after October 9 is Not yet verified. We found no official Missouri guidance.

The statute

The relevant law is RSMo 571.020, titled "Possession--manufacture--transport--repair--sale of certain weapons a crime--exceptions--penalties." The Revisor's page shows the current version effective January 1, 2017. Subsection 1 reads:

"A person commits an offense if such person knowingly possesses, manufactures, transports, repairs, or sells:"

(6) "Any of the following in violation of federal law: (a) A machine gun; (b) A short-barreled rifle or shotgun; (c) A firearm silencer; or (d) A switchblade knife."

Subdivisions (1) to (5) cover other items, such as explosive weapons, gas guns and knuckles. Those are not qualified by the federal-law test.

How Missouri defines an SBR

The state statutes we read have no SBR definition. Section 571.020 uses the term without defining it. Federal law (26 U.S.C. 5845) draws the lines: a rifle with a barrel under 16 inches, or a weapon made from a rifle with an overall length under 26 inches.

Penalty

Subsection 3 says "An offense pursuant to subdivision (1), (2), (3) or (6) of subsection 1 of this section is a class D felony." Subdivision (6) includes short-barreled rifles. We haven't verified the sentencing range for a class D felony, so we don't state it here.

Is legality tied to federal registration?

Indirectly. The state text doesn't mention the NFA or registration. It asks whether the SBR is held "in violation of federal law." If it isn't, there is no offense under this section.

ATF's October 9, 2026 open letter says it stopped enforcing Form 1 and Form 4 approval and registration for SBRs, SBSs, suppressors and AOWs. Voluntary forms are still processed. Whether an SBR left unregistered under that policy counts as "in violation of federal law" is untested. Not yet verified.

There is an argument each way. The NFA registration provisions remain in the U.S. Code, and non-enforcement is a policy that can change. On the other hand, ATF isn't enforcing them now. We found no Missouri Attorney General opinion or state police statement on how the wording applies to SBRs.

Our Missouri suppressor guide covers the same subdivision (6) test for silencers, including Missouri's own lawsuit against ATF. It also notes that a $0 voluntary Form 4 removes the question for a suppressor. Whether to file a voluntary Form 1 or Form 4 for an SBR is your call, and a Missouri attorney can advise.

Hunting

SBR-specific hunting rules: Not yet verified. Per our suppressor guide, the Missouri Department of Conservation's hunting-methods rule, 3 CSR 10-7.410, doesn't mention suppressors, and we found no other MDC rule that bars them.

Other laws that interact

Same section, same test. Machine guns, silencers and switchblade knives sit in the same subdivision (6) and carry the same federal-law qualifier. Short-barreled shotguns are covered by the same wording as SBRs.
Exceptions. Subsection 2 says "A person does not commit an offense pursuant to this section if his or her conduct involved any of the items in subdivisions (1) to (5) of subsection 1." Those exceptions don't reach subdivision (6), so there is no separate licensee exception for SBRs.
State license or permit for an SBR: Not yet verified.
Assault weapon definitions, minors, concealment, CLEO certification and manufacturing rules: Not yet verified. We haven't reviewed other Missouri laws for this page.

Local discharge rules, lease terms and federal land rules can apply no matter what 571.020 says.

Braced pistols

The state statutes cited here don't mention pistol braces. See our pistol brace guide for the federal side.

Federal process in 2026

The making and transfer tax on SBRs has been $0 since January 1, 2026.
ATF stopped Form 1 and Form 4 enforcement on October 9. Voluntary forms are still processed. See NFA wait times.
Dealers use a Form 4473 and NICS check. ATF won't enforce 18 U.S.C. 922(b)(4) "Until final rules are issued."
"For now," interstate transport still needs an approved Form 20 (18 U.S.C. 922(a)(4)).
A dealer can't sell where state law forbids it (18 U.S.C. 922(b)(2)).

ATF says there is no automatic grandfathering if enforcement resumes. Full detail is on our SBR rules 2026 page, and you can compare states with the state NFA checker.

Checked against the official statute text on October 28, 2026.

Frequently asked questions

Are short-barreled rifles legal in Missouri?

Yes, when lawful under federal law. RSMo 571.020.1(6)(b) makes possessing, making, transporting, repairing or selling a short-barreled rifle an offense only in violation of federal law. A violation is a class D felony.

Does Missouri require NFA registration for an SBR?

The statute never mentions registration. It asks only whether the SBR is in violation of federal law. How that applies to an SBR not registered after ATF's October 9, 2026 change is not yet verified, and we found no official Missouri guidance.

What is the penalty for an unlawful SBR in Missouri?

Under RSMo 571.020.3, an offense under subdivision (6) of subsection 1 is a class D felony. We haven't verified the sentencing range.

Can you hunt with an SBR in Missouri?

SBR-specific hunting rules are not yet verified. Our suppressor guide notes that the Conservation Department's hunting-methods rule, 3 CSR 10-7.410, doesn't mention suppressors.

Do I need a Form 20 to bring an SBR into or out of Missouri?

According to ATF's fact sheet, "For now," transporting an SBR across state lines still requires an approved Form 20.

Are short-barreled rifles legal in Missouri? (2026)

The short answer

The statute

How Missouri defines an SBR

Penalty

Is legality tied to federal registration?

Hunting

Other laws that interact

Braced pistols

Federal process in 2026

Frequently asked questions

Sources

Keep exploring

Are short-barreled rifles legal in Missouri? (2026)

The short answer

The statute

How Missouri defines an SBR

Penalty

Is legality tied to federal registration?

Hunting

Other laws that interact

Braced pistols

Federal process in 2026

Frequently asked questions

Sources

Keep exploring

The Gun Release Report