Thinking about buying a pair of brass knuckles in Hawaii? Or maybe you already have some and you’re not sure if you’re breaking the law. Either way, you’re in the right place.
Hawaii’s rules on brass knuckles changed not too long ago. Honestly, a lot of people still don’t know about the update. So let’s clear things up, step by step.
What Are Brass Knuckles, Legally Speaking?
Brass knuckles are a hand weapon. You slip your fingers through the holes. Then your fist becomes a lot more dangerous when it hits something.
Hawaii law doesn’t just say “brass knuckles.” It uses the term “metal knuckles.” This shows up in the state’s weapons statute. Trench knives and karambit knives with knuckle guards usually count too.
Why does Hawaii regulate this stuff? Simple. Lawmakers see these items as tools that can cause serious injury fast. So they get treated differently than, say, a pocketknife.
Stay with me here, because the next part is where most people get confused.
Basic Brass Knuckles Laws in Hawaii

Owning Brass Knuckles
Here’s the big news. As of 2024, you can legally own brass knuckles in Hawaii. That’s a real change from the old rules.
Before 2024, Hawaii banned brass knuckles completely. Owning them, selling them, even making them was against the law. Then Governor Josh Green signed House Bill 2342 into law. This became Act 021.
That new law repealed the total ban. It removed brass knuckles from the list of banned items, along with butterfly knives, switchblades, and a few other weapons. Big shift, right?
Wondering why this happened? A federal court had ruled that Hawaii’s ban on butterfly knives violated the Second Amendment. Lawmakers decided to update several weapons laws at once instead of fighting it item by item.
So today, you’re allowed to own brass knuckles in Hawaii. You can also buy, sell, and transport them legally. Pretty straightforward, honestly.
Carrying Brass Knuckles
Okay, pause. Read this part carefully, because this is where people get tripped up.
You can carry brass knuckles openly in Hawaii. That means in plain sight, where anyone can see them. Maybe clipped to your belt or visible in a holster.
But you cannot carry them concealed. Concealed means hidden on your body or hidden in a bag you’re carrying. That part is still very much illegal.
Confused about the difference? Think of it like this. Wearing a knife on your belt in plain view is fine. Tucking that same knife inside your jacket pocket where nobody can see it is not fine. Same idea applies here.
Penalties and Consequences
So what happens if you break this law? Let’s talk numbers.
Carrying concealed brass knuckles is a misdemeanor under Hawaii law. A misdemeanor is a less serious crime than a felony, but it’s still a real criminal charge. It can mean up to one year in jail and fines depending on the judge’s decision.
Here’s where it gets more serious. If police catch you with concealed brass knuckles, they can arrest you on the spot without a warrant. No waiting around. That’s how strict this particular rule is.
There’s also a rule about what happens to the weapon itself. If you’re convicted, the brass knuckles get destroyed by the police or sheriff. You don’t get them back. Ever.
Now, here’s where things get serious for real. If you use brass knuckles while committing another crime, like an assault or a robbery, the charge jumps way up. That’s a class C felony under Hawaii law. Felonies carry much harsher penalties, often including years in prison.
Think of it like a traffic ticket compared to a DUI. One is a hassle. The other can follow you for life.
Special Circumstances Worth Knowing

Don’t worry, we’ll break this down further, because a few situations trip people up.
Local rules can add extra layers. Hawaii’s counties, like Honolulu, Maui, and Hawaii County, may have their own ordinances. It’s smart to check with your local police department before assuming state law is the only thing that applies to you.
Using force still matters. Even if you legally own and carry brass knuckles, using them against another person can still lead to assault charges. Hawaii’s self-defense laws require the threat to be real and immediate. You can’t just swing first and explain later.
Travelers should be careful too. If you’re visiting Hawaii from another state, don’t assume your home state’s rules apply. Some states ban brass knuckles outright. Bringing them into Hawaii, even legally purchased ones, means you follow Hawaii’s open carry rule the moment you’re here.
Honestly, this concealed versus open carry distinction is probably the most important thing in this whole article. Miss that detail, and you could end up with a criminal record over something you thought was totally fine.
How to Stay on the Right Side of the Law
You’re not alone if this feels like a lot to track. Here’s the simple version.
Keep your brass knuckles visible if you’re carrying them at all. Don’t tuck them into a pocket, bag, or waistband where they’re hidden from view. That single habit keeps you out of misdemeanor territory.
Never use them in a way that could be seen as starting a fight. Self-defense laws protect you when you’re facing a genuine threat, not when you’re the one escalating things.
If you’re a business owner selling weapons, make sure you’re following any licensing rules that apply to your shop. Selling is legal now, but that doesn’t mean there’s zero paperwork involved for retailers.
When in doubt, it honestly makes sense to call a local attorney. Weapons laws shift more often than people expect, and a quick phone call beats a court date.
Why This Law Exists

Personally, I think Hawaii’s approach makes some sense, even if it’s a little confusing at first glance. Lawmakers wanted to respect a court ruling on weapons rights. At the same time, they didn’t want people walking around with hidden weapons nobody can see coming.
It’s similar to how many states handle knives. Open carry gets treated as transparent and low risk. Concealed carry gets treated as a bigger public safety concern. Makes sense, right?
Final Thoughts
Here’s the short version. You can legally own brass knuckles in Hawaii now. You can carry them openly. You cannot hide them on your body or in a bag. Do that, and you’re looking at a misdemeanor charge, possible jail time, and losing the item for good.
Use them in a crime, and the penalty jumps to a felony. That’s a whole different level of trouble.
Now you know the basics. Stay informed, stay safe, and when in doubt, look it up or ask a lawyer. It’s a lot easier to ask a quick question now than to deal with a court case later.
Frequently Asked Questions
Is it legal to own brass knuckles in Hawaii in 2026?
Yes. Since 2024, Hawaii allows people to own, buy, sell, and transport brass knuckles legally.
Can I carry brass knuckles in my pocket in Hawaii?
No. Carrying them concealed, including in a pocket or bag, is still a misdemeanor under Hawaii law.
What happens if I get caught with concealed brass knuckles?
You could face a misdemeanor charge, possible jail time, fines, and the weapon itself gets destroyed after a conviction.
Does using brass knuckles in a fight change the charges?
Yes. Using them while committing a crime, like an assault, can lead to a class C felony charge instead of a misdemeanor.
Do all Hawaii counties follow the same rule?
State law applies everywhere in Hawaii, but counties can add their own local ordinances, so it’s worth double checking locally.
References
- Hawaii Revised Statutes § 134-51, Deadly weapons; prohibitions; penalty. Justia Law. https://law.justia.com/codes/hawaii/title-10/chapter-134/section-134-51/
- Hawaii House Bill 2342 (2024), Act 021, Relating to Weapons. Hawaii State Legislature. https://www.capitol.hawaii.gov/sessions/session2024/bills/HB2342_.PDF
- Knife Rights, “Hawaii Legalizes Butterfly, Switchblade & Gravity Knives & More!” https://kniferights.org/legislative-update/hawaii-legalizes-butterfly-switchblade-gravity-knives/
- Hawaii News Now, “Amid mounting legal challenges, Hawaii allows open carry of formerly banned blades.” https://www.hawaiinewsnow.com/2024/05/17/amid-mounting-legal-challenges-hawaii-allows-open-carry-formerly-banned-blades/
- Hawaii Free Press, “Green Signs HB2342: Legalizes ‘open carry’ of everything except guns.” https://www.hawaiifreepress.com/Articles-Main/ID/40864/Green-Signs-HB2342-Legalizes-open-carry-of-everything-except-guns