Yes, brass knuckles are illegal in Kansas. K.S.A. 21-6301 bans possessing, buying, selling, or manufacturing metal knuckles outright, and a violation is a class A nonperson misdemeanor carrying up to one year in jail and a fine of up to $2,500. The law targets the item itself, so having a set in your pocket, car, or home is enough for a charge, even if you never intended to use them.1Kansas Office of Revisor of Statutes. Kansas Code 21-6301 – Criminal Use of Weapons
What the Law Requires to Convict You
K.S.A. 21-6301 is titled “Criminal use of weapons,” and subsection (a)(1) lists metal knuckles alongside bludgeons and sand clubs. The statute uses “metal knuckles” as a general term that covers brass knuckles and similar devices regardless of the specific metal. The only mental state the prosecution has to prove is that you “knowingly” had the item. There is no requirement to show you planned to use them against anyone.1Kansas Office of Revisor of Statutes. Kansas Code 21-6301 – Criminal Use of Weapons
That matters because subsection (a)(2) of the same statute, which covers daggers, blackjacks, and dangerous knives, is only violated when you possess those items “with intent to use the same unlawfully against another.” Metal knuckles don’t get that qualifier. Possession alone completes the offense.
Kansas does not define metal knuckles by dimensions, materials, or physical features. The statute uses the term without elaboration, so items marketed as novelty, decorative, or collectible knuckles can still fall within the ban if they function the same way.
Penalties for Possession, Sale, or Manufacturing
A violation of (a)(1) is a class A nonperson misdemeanor, the most serious misdemeanor category in Kansas. The same classification applies whether you were carrying brass knuckles, buying them, selling them, or making them. The maximum punishment is one year in county jail, and the court can impose a fine of up to $2,500 either on top of or instead of jail time.2Kansas Office of Revisor of Statutes. Kansas Code 21-6602 – Sentence for Misdemeanor3Kansas Office of Revisor of Statutes. Kansas Code 21-6611 – Fines for Misdemeanor
First-time offenders often receive probation or community service rather than jail, depending on prior history and the circumstances of the arrest. A conviction still goes on your record and can show up on employment, licensing, and housing background checks.
If You Actually Use Them on Someone
Charges escalate sharply when brass knuckles are used in a confrontation. Metal knuckles can qualify as a deadly weapon under Kansas assault and battery statutes. Aggravated assault with a deadly weapon is a severity level 7 person felony under K.S.A. 21-5412.4Kansas Office of Revisor of Statutes. Kansas Code 21-5412 – Aggravated Assault Aggravated battery, which requires actually causing bodily harm with a deadly weapon, is also a severity level 7 person felony under K.S.A. 21-5413.5Kansas Office of Revisor of Statutes. Kansas Code 21-5413 – Aggravated Battery A felony charge would be filed on top of the weapons misdemeanor, with potential prison exposure that far exceeds the one-year ceiling for simple possession.
Who Is Exempt
K.S.A. 21-6301(c) carves out a limited set of exemptions:
- Law enforcement officers, and anyone they summon to help make arrests or keep the peace while actively assisting.
- Wardens, superintendents, directors, security personnel, and jailers at prisons, jails, and detention facilities while acting within their authority.
- Active-duty and reserve members of the U.S. armed forces and the Kansas National Guard while performing official duties.
- Anyone manufacturing, transporting, or selling weapons to the groups above.
These are narrow. A retired officer does not qualify, and an off-duty Guard member acting in a personal capacity does not either. The supplier exemption only covers sales to the exempt categories.1Kansas Office of Revisor of Statutes. Kansas Code 21-6301 – Criminal Use of Weapons
Defenses That Can Work
Because the statute only asks whether you knowingly possessed the item, arguments about intent fail. Telling the court you kept them as a collectible, a prop, or a paperweight will not overcome the statute’s plain language. The defenses that have real traction attack other elements of the case:
- Lack of knowledge, if you genuinely did not know the item was in your possession, such as finding brass knuckles in a borrowed bag.
- Illegal search and seizure, where evidence found through a Fourth Amendment violation can be suppressed and the charge dismissed.
- Misidentification of the object, since the statute does not describe what qualifies as metal knuckles, leaving room to argue a specific item does not fit.
Clearing a Conviction Later
A class A misdemeanor conviction for brass knuckles can be expunged under K.S.A. 21-6614, but only after you have fully satisfied your sentence, including jail time, probation, fines, and community service, and waited at least three years. You also cannot have a felony conviction in the two years before filing.6FindLaw. Kansas Code 21-6614 – Expungement
Meeting the waiting period does not guarantee approval. The court weighs your circumstances and whether expungement serves the public welfare. If granted, the conviction and arrest records are sealed from most background checks.