NFA items are legal in Kansas if you complete federal ATF registration. Kansas does not run its own NFA registry, does not impose any state-level NFA...
Reviewed by Will Luker, Founder of CCW Hub. USCCA Training Counselor, USCCA Certified Instructor, NRA Certified Instructor, Law Enforcement.
NFA items are legal in Kansas if you complete federal ATF registration. Kansas does not run its own NFA registry, does not impose any state-level NFA prohibitions beyond what federal law prohibits, and does not require Kansas-specific paperwork for a properly registered suppressor, machine gun, short-barreled shotgun (SBS), short-barreled rifle (SBR), any other weapon (AOW), or destructive device (DD). The state's role is narrow: K.S.A. 21-6301 lists certain NFA-class items as state crimes and then carves the federal-NFA-compliant owner back out of the prohibition.
Bottom line for Kansas residents: if your suppressor, machine gun, or SBS is properly registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) in your name (or in the name of your trust or entity), and you are a person allowed to possess that item under federal law, you are not committing a Kansas crime. SBRs and most AOWs are not prohibited by Kansas statute at all. The federal NFA framework (26 U.S.C. ch. 53; 27 C.F.R. Part 479) controls the registration process.
Kansas does not have a stand-alone NFA chapter. The original state machine-gun article (Article 26 of Chapter 21, K.S.A. 21-2601 and 21-2602) was repealed and is no longer in active use. What remains is K.S.A. 21-6301, the criminal-use-of-weapons statute, which lists two categories that overlap with the federal NFA:
A violation of either subsection is a severity level 9, nonperson felony under K.S.A. 21-6301(b)(2). Under the Kansas sentencing grid, severity level 9 nonperson felonies carry a presumptive sentence of probation with an underlying prison range of roughly 5 to 17 months depending on criminal-history score.
What K.S.A. 21-6301(a)(5) does not cover is short-barreled rifles. The statute reaches shotguns with barrels under 18 inches and any automatic firearm, but it does not list rifles with barrels under 16 inches as state-prohibited weapons. An SBR registered on a federal Form 1 or Form 4 is therefore not separately prohibited by Kansas law. The same is true of AOWs and most destructive devices: Kansas has no state-law prohibition that runs parallel to those federal categories, so an ATF-approved transfer is sufficient to make ownership lawful in Kansas.
K.S.A. 21-6301(h) is the operative exemption. It states:
Subsections (a)(4) and (a)(5) shall not apply to or affect any person or entity in compliance with the national firearms act, 26 U.S.C. § 5801 et seq.
In practical terms, "compliance with the national firearms act" means the item is registered in the National Firearms Registration and Transfer Record (NFRTR) and the transfer or making was approved by ATF on a Form 1 (manufacture, including a shotgun-to-SBS or rifle-to-SBR build) or Form 4 (transfer from a dealer or another individual). If ATF has issued the approval and you are the registered possessor, K.S.A. 21-6301(a)(4) and (a)(5) do not apply to you.
The Kansas Attorney General confirmed how this defense works in AG Opinion 2015-14, which holds that compliance with the National Firearms Act is required to qualify for the K.S.A. 21-6301(h) defense. If federal compliance is missing or has lapsed, the state prohibition snaps back into effect and every day of possession is a state felony.
There is a parallel carve-out on the carrying side. K.S.A. 21-6302 (criminal carrying of a weapon) lists shotguns under 18 inches and automatic firearms among the items it covers, then exempts "any person or entity in compliance with the national firearms act, 26 U.S.C. § 5801 et seq." under K.S.A. 21-6302(e)(3). The same federal-registration logic applies to transport and carry as to possession.
Suppressors remain NFA-regulated weapons. They are registered to a specific person or trust, require an ATF Form 4 transfer, and go through a federal background check. Federal NFA registration applies to suppressors under 26 U.S.C. ch. 53. Effective January 1, 2026, P.L. 119-21 (the One Big Beautiful Bill Act, signed July 4, 2025) reduced the federal NFA making and transfer tax to $0 for silencers, SBRs, SBSs, and AOWs; the tax remains $200 for machine guns and destructive devices. The $0 tax does not waive the federal registration requirement.
A suppressor is a "device or attachment" prohibited by K.S.A. 21-6301(a)(4) unless the owner is in compliance with the federal NFA under K.S.A. 21-6301(h). Any change to the federal transfer tax does not waive the federal registration requirement, and an unregistered suppressor in Kansas remains a severity level 9 felony regardless of whether any tax was owed.
Kansas has a state law, K.S.A. 50-1201 et seq., commonly called the Second Amendment Protection Act (SAPA), that purports to exempt firearms and firearm accessories made and kept entirely within Kansas from federal regulation. K.S.A. 21-6301(i)(1) creates a limited "Kansas-made firearm accessory" carve-out that the Kansas legislature added in 2013, cross-referencing K.S.A. 50-1204, for offenses occurring on or after April 25, 2013.
Read alone, K.S.A. 21-6301(i) appears to authorize possession of a Kansas-made, unregistered suppressor. It does not, in operational terms, protect you from federal prosecution. The Tenth Circuit settled this directly in United States v. Cox, 906 F.3d 1170 (10th Cir. 2018), affirming convictions for unregistered NFA items where defendants relied on the Kansas SAPA - the federal NFA preempts SAPA as applied. Operators should not rely on this state carve-out; treat it as preempted by federal law per Cox.
Practical guidance: treat K.S.A. 21-6301(i) as a state-court defense only. Anyone who possesses, makes, or transfers a suppressor in Kansas without a federal Form 1 or Form 4 is exposed to federal prosecution under the federal NFA framework regardless of any Kansas-made-accessory paperwork. The safe path for civilians is the standard federal NFA registration, which independently satisfies the K.S.A. 21-6301(h) defense and removes the federal exposure.
Machine guns sit on top of K.S.A. 21-6301(a)(5) plus an extra federal limit. Federal law (18 U.S.C. § 922(o)) generally bars civilian possession of machine guns manufactured after May 19, 1986; pre-1986 lawfully-registered MGs may be possessed and transferred subject to NFA rules. The federal registry was closed to new civilian transferable machine guns on that date. Machine guns lawfully registered before May 19, 1986 may continue to be possessed and may be transferred to other qualified civilians, subject to ATF approval on a Form 4.
Applying this framework to Kansas:
Each civilian machine gun transfer requires a federal tax stamp under the NFA framework; consult ATF guidance for current tax amounts.
A shotgun with a barrel under 18 inches is prohibited at the state level by K.S.A. 21-6301(a)(5) absent NFA compliance. The federal definition uses 18-inch barrel and 26-inch overall length thresholds. To possess an SBS in Kansas, you need:
Kansas does not impose a separate state-issued permit, and there is no Kansas-specific paperwork beyond what you keep at home with the federal registration.
K.S.A. 21-6301(a)(5) covers shotguns under 18 inches but does not list rifles under 16 inches. Kansas has no state statute that separately prohibits SBRs. An SBR registered with ATF on a Form 1 or Form 4 is lawful in Kansas without any state-level paperwork or carve-out beyond the federal registration itself.
This is a difference from neighboring states with their own SBR-specific statutes. It does not change the federal requirement: an unregistered SBR is still a federal felony under the federal NFA framework, so the practical answer for a Kansas resident is the same. Build or buy on a Form 1 or Form 4. The state-side legal exposure on an SBR specifically is, however, lower than on a suppressor, machine gun, or SBS, because there is no parallel state prohibition.
K.S.A. 21-6301(a)(7) and (a)(14) deal with firearms with barrels under 12 inches (a handgun threshold), and K.S.A. 21-6301(a)(7) prohibits transferring such a firearm to a person under 18. Those provisions are aimed at handguns, not SBRs, and do not change the SBR analysis above.
"Any other weapon" (AOW) under federal law includes pen guns, smooth-bore handguns, certain disguised firearms, and short-barreled shotguns under specific overall-length conditions. AOWs are NFA-registered on a Form 4 with a reduced transfer tax under the federal NFA framework. Kansas has no state statute that separately prohibits AOWs as a category, although individual items in the AOW class may overlap with K.S.A. 21-6301(a)(2) (concealed dangerous or deadly weapons) depending on configuration. A registered AOW carried with intent to use unlawfully against another could still trigger 21-6301(a)(2) on its own facts.
Destructive devices, including grenades, bombs, and firearms with bore diameters greater than half an inch (with sporting exceptions), are NFA-registered with a federal transfer tax. Kansas does not have a state-law category that adds to the federal restriction for civilian-registered DDs. Possession of an unregistered destructive device is a federal felony under the federal NFA framework, and Kansas would also reach unregistered devices under K.S.A. 21-6301(a)(5) if the device qualifies as a firearm capable of automatic fire, or under separate explosive-device statutes outside the criminal-use-of-weapons framework.
K.S.A. 21-6301(d) provides a separate exception for items "rendered unserviceable by steel weld in the chamber and marriage weld of the barrel to the receiver" that have been registered in the NFRTR under 26 U.S.C. § 5841 et seq. in the possessor's name. This is the standard ATF dewat (deactivated war trophy) framework. If you inherit or acquire a welded display piece that is properly registered in NFRTR in your name, K.S.A. 21-6301(a)(4) and (a)(5) do not apply.
K.S.A. 21-6301(c) lists persons to whom the (a)(1), (a)(2), and (a)(5) prohibitions do not apply. The list covers:
K.S.A. 21-6301(f) adds a tactical-unit exception to the (a)(4) suppressor prohibition for designated officers using agency-owned, ATF-approved suppressors during specific operations.
These exceptions are state-law only. Officers who possess agency-issued NFA items off-duty must still meet the federal registration requirements applicable to that off-duty possession.
| Offense | Statute | Classification | Notes |
|---|---|---|---|
| Possess unregistered suppressor | K.S.A. 21-6301(a)(4), (b)(2) | Severity level 9, nonperson felony | Presumptive probation; underlying 5 to 17 months prison depending on criminal-history score |
| Possess unregistered SBS or machine gun | K.S.A. 21-6301(a)(5), (b)(2) | Severity level 9, nonperson felony | Same severity level as (a)(4) |
| Carry unregistered NFA item | K.S.A. 21-6302 | Class A nonperson misdemeanor or higher depending on item | Federal-NFA-compliance carve-out at K.S.A. 21-6302(e)(3) |
| Federal possession of any unregistered NFA firearm | Federal NFA framework (26 U.S.C. ch. 53) | Federal felony | Federal penalties apply |
| Possess machine gun manufactured after May 19, 1986 (civilian) | 18 U.S.C. § 922(o) | Federal felony | Federal penalties apply; no state-side fix |
| Manufacture or transfer unregistered suppressor in Kansas relying on SAPA carve-out | Federal NFA framework | Federal felony | Federal courts have held the federal NFA preempts state opt-out statutes; do not rely on the K.S.A. 21-6301(i)(1) Kansas-made-accessory carve-out |
State and federal charges are separate sovereigns. A single act of unlawful NFA possession in Kansas can produce both a state K.S.A. 21-6301 prosecution and a federal prosecution under the NFA framework.
If you are a Kansas resident buying an NFA item from a Kansas FFL or Class III dealer:
Interstate transport of NFA items has federal procedural requirements; consult ATF guidance and 27 C.F.R. Part 479 before any out-of-state trip with an NFA item.
Within Kansas, an NFA-compliant owner may transport a registered suppressor, SBS, or machine gun on the same terms as any other firearm. K.S.A. 21-6302(e)(3) carves NFA-compliant persons out of the criminal-carrying statute, and Kansas's permitless-carry framework under K.S.A. 21-6302 allows lawful carry by adults 21 and older without a permit. Carrying a long gun openly in a vehicle is also permitted under Kansas law for persons not otherwise prohibited.
The operative state authorities for NFA items in Kansas are K.S.A. 21-6301, K.S.A. 21-6302, K.S.A. 50-1201 et seq. (the Second Amendment Protection Act), and K.S.A. 50-1204 (the Kansas-made firearm accessory definition). The interpretive Kansas Attorney General opinion is AG Op. 2015-14. The federal authority that controls NFA registration is the federal NFA framework at 26 U.S.C. ch. 53, including 26 U.S.C. § 5841 (the registration record). The federal machine-gun cutoff is 18 U.S.C. § 922(o). Implementing regulations are at 27 C.F.R. Part 479. Federal courts have held that the federal NFA preempts state opt-out statutes such as the Kansas SAPA suppressor carve-out at K.S.A. 21-6301(i)(1).
<!-- federal-context-block:added-2026-05-20 -->Bump stocks - Garland v. Cargill (2024). In Garland v. Cargill, 602 U.S. ___ (2024), the U.S. Supreme Court struck down the federal regulation classifying bump stocks as machineguns under the National Firearms Act. As a matter of FEDERAL law, bump stocks are no longer NFA-regulated. State law may still independently restrict bump stocks; consult your state's RESTRICTIONS section for any state-level bump-stock prohibition.
P.L. 119-21 NFA tax (2026). Effective January 1, 2026, P.L. 119-21 (the One Big Beautiful Bill Act, signed July 4, 2025) reduced the federal NFA making and transfer tax to $0 for silencers, SBRs, SBSs, and AOWs. Machine guns and destructive devices retain the $200 tax. The federal registration requirements (Form 1 / Form 4, fingerprints, photographs, CLEO notice) remain unchanged.
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