The 6 Best AR-15 Bayonets of 2026: All Budgets
The 6 best AR-15 bayonets that actually mount and that you can actually buy, from the genuine issued Ontario M9 to a $38 budget blade. Which pattern fits your rifle, and how to tell if your AR even takes one.
A bayonet is the one AR-15 upgrade nobody needs and plenty of people still want, and there’s no shame in either camp. Maybe you’re finishing a retro build and the lug looks naked. Maybe you clear brush on real land. Maybe you just think a rifle should still be able to end an argument after the magazine empties. All valid.
We know, bayonets? You’re probably thinking something like this.
Nobody’s ordering a charge across an open field anymore. But the lug is still on many rifles, and there’s still a right way and a wrong way to fill it.
Here’s what nobody tells you up front: nearly every AR-15 bayonet on the market is one of two military patterns. The M9 is the big modern one, seven inches of blade with a scabbard that doubles as a wire cutter. The M7 is the slimmer Vietnam-era blade it replaced. Ontario builds the genuine articles under government contract, and a dozen other outfits clone them at every price point.
We cover all of them in our picks below, ranging from $38 to $200. Every one locks onto a lug, and we’ll tell you which are tools and which are wall art.
TL;DR
Short on time: the Ontario M9 is the real-deal, still-issued Army bayonet and the one to buy if you only buy one. The Smith & Wesson SW3B does most of that job for about half the money, and the Wartech M9 puts a genuine lug-mounting blade on your rifle for thirty-eight dollars as long as you take it for what it is. Want the best pure knife rather than the best mount? That is the Ontario OKC-3S, eight inches of Marine Corps steel. Keep reading.
Best AR-15 Bayonets
Our top picks. Jump straight to a product review or open the full retailer list.
| Bayonet | Best For | Blade Length | Steel | Made In | Street Price |
|---|---|---|---|---|---|
| Ontario M9 (6143) | Best Overall | 7 in | 420 stainless | USA | ~$200 |
| S&W SW3B M-9 | Best Value | 7.8 in | Stainless | Import | ~$105 |
| Wartech M-9 | Best Budget | 8 in | 3Cr13 stainless | Import | ~$38 |
| Ontario OKC-3S | Fighting Blade | 8 in | 1095 carbon | USA | ~$173 |
| Ontario 494 M7 | Retro Builds | 6.7 in | 1095 carbon | USA | ~$143 |
| Rothco GI-Type M-9 | Surplus Look | 7 in | Stainless | Import | ~$94 |
Why Anyone Still Fixes a Blade
The Army cut bayonet training from basic in 2010, when TRADOC decided ten weeks was better spent on skills soldiers were actually using in Afghanistan. But the last charges are more recent than you would guess. British troops fixed bayonets at Danny Boy in Iraq in May 2004, the first time since the Falklands, and Lance Corporal Sean Jones led another against the Taliban in Helmand in October 2011.
So why is the lug still on your rifle? Because a bayonet is the one accessory that still works after the magazine runs dry, and because plenty of us think a rifle looks unfinished without one. Both are good enough reasons.
The Ontario Shakeup: Why Bayonet Prices Are Weird Right Now
If you price-check these online you’ll notice the numbers don’t sit still, and there’s a reason. In 2023 the Ontario Knife Company, the outfit that has held the US military bayonet contract for decades, closed its Franklinville, New York plant. Blue Ridge Knives bought the name, the designs, and the tooling for about $2.1 million and moved production. The knives are still made. The supply chain got a shake, and dealer stock is now a mix of old Franklinville pieces and newer production.
Two things fall out of that for a buyer. First, the same SKU can swing thirty or forty bucks between dealers depending on which batch they’re sitting on, so it pays to check two or three before you click. Second, the Marine OKC-3S has gone scarce at several big retailers, listed as discontinued at some. It’s still findable new, but if you want one, this is not the year to sit on your hands. Prices float. History doesn’t.
1. BEST OVERALL: Ontario M9 (6143)
1986. That’s the year the M9 became the Army’s standard bayonet, and your tax dollars still buy this exact knife from this exact company today. When the thing you’re shopping for is the actual issued item and not a tribute to it, the review mostly writes itself.
The Short Version
- Blade: 7 in, 420 modified stainless, cryo heat-treated, black oxide, sawback spine
- Overall length: 12 1/8 in
- Mount: muzzle ring plus lug latch, fits M16A1/A2, M4, and pre-ban AR-15 lugs
- Sheath: nylon scabbard with a real wire cutter, sharpening stone, and quick-release clip
- Made in: USA
- Street price: about $195 to $205 as of July 2026
The M9 is the big, do-everything one. Longer and beefier than the M7 it replaced, with a wide clip-point blade and a sawback spine, and the scabbard is half the reason to buy it: clip the blade into the sheath and you’ve got a functioning wire cutter, the kind that actually snips concertina, plus a built-in stone to bring the edge back. The lock-up is the good part. The muzzle ring and pommel latch clamp it to the rifle with zero wobble, and it comes off with one squeeze.
The steel is a fair trade, not a compromise. 420 modified stainless with a sub-zero cryo treatment won’t hold an edge like premium carbon, but it shrugs off rust in a nylon sheath that lives in a truck, and it sharpens back fast. For a blade that spends most of its life mounted or stored, that’s the right call.
Flaws but Not Dealbreakers
It’s the priciest pick here at around two hundred bucks, and it’s heavy on the end of a carbine, so if your build is a lightweight the M9 will let you know. The sawback is more useful for cutting your hand on than cutting seasoned wood, as with basically every sawback bayonet ever made. And on a 16-inch carbine you may need a lug adapter for it to sit right, which we get into below.
Bottom line: If you want the genuine current-issue bayonet, USA-made, with the best sheath in the category, this is the one and it isn’t close. Buy once.
Ontario M9 (6143)
The knife the Army still issues, made in the USA by the company that holds the contract. If you buy one bayonet, buy this one.
2. BEST VALUE: Smith & Wesson SW3B Special Ops M-9
You want steel on the lug. You do not want to spend two hundred dollars on a knife you’ll mount for a photo and then admire from the safe. That exact buyer is who the Smith & Wesson SW3B is built for, and it’s the pick we’d hand most people who aren’t chasing the genuine-issue stamp.
The Short Version
- Blade: 7.8 in stainless spear point, black finish
- Overall length: about 12 3/4 in
- Mount: standard mil-spec lug latch and muzzle ring
- Sheath: MOLLE scabbard with wire cutter, sharpening stone, and a storage pouch
- Street price: about $100 to $110
Dollar for dollar this is the most bayonet on the list. It’s an M9-pattern blade with a real lug latch, a spear-point profile that stabs and slices better than a stubby clip point, and honestly the best sheath here after the Ontario, a full MOLLE rig with its own cutter and stone. Smith & Wesson doesn’t forge it in a mountain fortress, it’s a well-made overseas blade with a name-brand warranty behind it, and at a hundred bucks that’s a trade most buyers take happily.
The one real gotcha is fitment. The SW3B was drawn around the older 14.5-inch barrel spacing, so on a modern 16-inch carbine you may need a bayonet lug adapter to get the muzzle ring to line up. That’s true of nearly every M9 clone, and we cover the fix below, but budget for it.
Flaws but Not Dealbreakers
The stainless is a mid-tier steel, fine for cutting and prying in a pinch, not a bushcraft heirloom. Fit and finish is good, not Ontario-good. And the overseas origin bothers some buyers on principle, which is a fair thing to care about. Ask me how much I care when I’m saving a hundred dollars.
Bottom line: The smart-money pick. Most of the M9 experience, half the M9 price, and the best sheath under a hundred bucks.
Smith & Wesson SW3B Special Ops M-9
Half the Ontario M9's price, a real lug mount, and the best sheath in the lineup. The value play, full stop.
3. BEST BUDGET: Wartech M-9
Thirty-eight dollars. Let’s be honest about what that number gets you, because honesty is the whole reason to buy at this price instead of pretending. The Wartech M9 is a Chinese-made M9 clone that costs less than a case of decent ammo, mounts to a standard lug, and looks aggressive on the front of a rifle. That’s the pitch, and for a lot of buyers it’s enough.
The Short Version
- Blade: 8 in, 3Cr13 stainless, drop point, roughly 5mm thick
- Mount: functional M9-pattern lug latch and muzzle ring
- Sheath: basic nylon
- Street price: about $38
Owners will tell you it shows up surprisingly sharp and the blade’s thick enough to hack and stab without folding. For plinking-day fun, a costume gun, or a beater you genuinely don’t care about, it delivers the tactical vibe for beer money. Nobody’s heart got broken losing a thirty-eight-dollar bayonet.
But 3Cr13 is soft steel and it behaves like it: the edge dulls quick and won’t survive real abuse, and the reports of it snapping on the thin spots are believable. This is a light-duty and display blade, not a life-or-death tool, and anyone who tells you different at this price is selling something.
Flaws but Not Dealbreakers
Soft steel, budget sheath, and quality control that’s a bit of a lottery. None of that is a surprise at thirty-eight dollars, and none of it is a dealbreaker if you bought it knowing exactly what it is.
Bottom line: The floor. The cheapest way to get a real-mounting bayonet on your rifle, as long as you treat it like the thirty-eight-dollar blade it is.
Wartech M-9
Thirty-eight dollars puts steel on your lug. Know exactly what that buys and it's hard to be mad at.
4. BEST FIGHTING BLADE: Ontario OKC-3S (6504)
The M9 is the Army’s answer. This is the Marine Corps’, and it is a meaner-looking thing. When the Corps replaced the M7 in 2003, they didn’t want a better wire cutter, they wanted a better knife, and the OKC-3S is what they got: eight inches of 1095 carbon steel with a Ka-Bar bloodline and a partially serrated edge.
The Short Version
- Blade: 8 in, 1095 carbon steel, partially serrated, black powder coat
- Overall length: about 13 1/4 in
- Mount: muzzle ring plus lug latch, M16/M4/AR-15 pattern
- Handle: Dynaflex, textured for a wet grip
- Street price: about $170 to $175, when you can find it
Of everything here, this is the one you’d actually pick if you had to use it as a knife. The extra inch of blade over the M9 and the Ka-Bar-pattern lineage mean it fights and works like a proper fixed blade, not a rifle accessory that happens to be sharp. The 1095 carbon takes a wicked edge. The Dynaflex handle holds on when your hands don’t.
The catch is availability. Per the Ontario shakeup above, the OKC-3S is thin on the ground right now and flat discontinued at a couple of major sellers. It’s still out there new, but you’re shopping a shrinking shelf, and prices reflect it.
Flaws but Not Dealbreakers
Carbon steel means maintenance: wipe it down, oil it, or it’ll spot on you, especially in that tight sheath. It’s the second-priciest pick and the hardest to find. And at eight inches it’s a lot of bayonet, which is either the entire point or slightly more than you wanted, depending on why you’re here.
Bottom line: If the blade is the reason you want a bayonet, not the mount, this is your pick. Just don’t dawdle, because the shelf is thinning.
Ontario OKC-3S (6504)
Eight inches of 1095, the bayonet the Marines have carried since 2003. The one you want if the blade itself is the point.
5. BEST FOR RETRO BUILDS: Ontario 494 M7
This is the blade that went to Vietnam on the end of an M16. The M7 was adopted in 1964, carried through the whole war, and served until the M9 replaced it in Army hands in the mid-eighties. Ontario still builds it new to the same government pattern, which makes it the one correct answer to a specific question: what bayonet finishes an M16A1 clone? This one. We gave it the full review here.
The Short Version
- Blade: 6.7 in, 1095 carbon steel, spear point with sharpened false edge
- Overall length: 11 3/4 in
- Weight: 11.2 oz, the lightest real bayonet here
- Mount: muzzle ring plus lug latch, M16/M4/AR-15 pattern
- Street price: about $140 to $145
The M7 is smaller and lighter than the M9, and on a period build that’s exactly right, because it’s what actually hung off those rifles. Slim checkered grip, spear-point blade, no sawback gimmick. As a plain knife it’s unremarkable, and it was always meant to be, but bolted to the front of a retro AR it’s the difference between a clone and a costume.
One myth to kill: you’ll see the M7 sold with a “serrated edge for cutting rope.” It isn’t serrated and never was. It’s a plain-edge spear point with a sharpened top swedge. Whoever started that rumor was copying a spec sheet they didn’t read.
Flaws but Not Dealbreakers
Carbon steel, so keep it oiled. The slim handle that’s period-correct is also less comfortable than the M9’s fat grip for hard cutting. And it’s a middling general-purpose knife, which matters not at all if you’re buying it for the reason most people buy it, which is that it belongs on that rifle.
Bottom line: The retro-build bayonet, full stop. Lightest real blade here, genuine pattern, and it makes an M16A1 clone finally look finished.
Ontario 494 M7
The Vietnam pattern, still built new to the government drawings. The right blade for an M16A1 clone.
6. BEST SURPLUS LOOK: Rothco GI-Type M-9
Ninety-four dollars buys the look. That’s the honest pitch for the Rothco GI-Type M9, and it’s a real pitch, not a knock. If you want the unmistakable M9 silhouette hanging off a display gun, a reenactment loadout, or a truck rifle you’re not precious about, this is the cheapest way to get it that still clicks onto a lug and stays there.
The Short Version
- Blade: 7 in stainless, GI-type M9 profile with sawback
- Mount: standard M9-pattern lug latch and muzzle ring
- Sheath: hard scabbard with wire-cutter slot
- Finishes: black or olive drab
- Street price: about $94 in OD, closer to $150 in black
It looks the part from three feet away and it mounts like it should. For costume, display, and casual use that is the entire job, and it does it for less than the S&W. Buy the olive-drab version and you’re under a hundred bucks.
Where it and the S&W part ways is everything past the silhouette. The Rothco’s steel is softer, the edge shows up dull and stays mediocre, and the fit is looser. Ten dollars less than the SW3B on paper, but the S&W is a real cut above in the hand. So this pick is about the look and the floor price, not the performance.
Flaws but Not Dealbreakers
Soft steel, so-so edge, and the black version’s price creeps up near real-blade territory where it has no business competing. Buy the OD one or don’t bother. Treat it as what it is, which is a good-looking prop that mounts, and you’ll be happy. Expect a field knife and you won’t.
Bottom line: The budget display pick. Right silhouette, right price in olive drab, honest about being a costume piece rather than a cutting tool.
Rothco GI-Type M-9
The GI silhouette for under a hundred bucks. A costume-and-display piece that happens to fit a lug, and honest about it.
Does Your AR Even Take a Bayonet?
Before you buy anything above, go look at your rifle, because a bayonet needs two things and a lot of modern ARs are missing one of them.
- A bayonet lug. That’s the small squared-off tab under the front sight base or gas block. Old-school A2 front sight towers almost always have one. Many modern rifles with slim free-float handguards and low-profile gas blocks do not.
- Muzzle clearance and barrel length. The muzzle ring has to reach the flash hider. Most of these bayonets were drawn around a 14.5-inch barrel with an A2 front sight, so on a 16-inch carbine the geometry can come up short.
No Lug? You Can Add One
So your handguard runs all the way to the muzzle and there’s no tab in sight. Three ways out, and none of them costs more than the cheapest bayonet on this list.
- Swap the gas block for an A2 front sight base. The correct fix: you get the real sight tower with the lug cast right where it belongs. Kexuan’s runs about $30, and Daniel Defense’s F-marked version is about $50 and the one we’d buy. Fair warning, this means pulling the handguard and pinning on a new block. It’s a wrench job, not a snap-on.
- Clamp a lug onto a rail. CAA’s bayonet lug mount bolts onto any Picatinny section for about $38. No gunsmithing, and it comes right back off. Just mount it far enough forward that the muzzle ring still reaches your flash hider.
- Or fix the fit instead. Already have a lug, but the bayonet rattles on a 16-inch barrel because the muzzle ring sits loose? That’s a $19 sleeve that fills the gap, not a new front end. Pull the flash hider, slip it on, put the flash hider back.
Work out which one you need before you buy the knife, because a bayonet that won’t seat is a very pointy paperweight. And if you’re still picking a handguard, our AR-15 handguard guide flags which setups keep a lug and which don’t.
One more thing worth thirty seconds: a handful of states treat a bayonet lug as a regulated feature on a semi-auto rifle. Check your own state’s rules before you build toward mounting one. We’re not lawyers, and this isn’t legal advice, just a nudge to look.
How to Choose an AR-15 Bayonet
Once you know it’ll mount, the decision comes down to four things:
- Pattern (M9 vs M7 vs OKC-3S). M9 is the big modern all-rounder with the wire-cutter sheath. M7 is the lighter Vietnam-era classic for retro builds. OKC-3S is the biggest, best pure knife. Pick the shape that matches your reason for buying.
- Steel. Carbon (1095) takes a sharper edge and holds it longer but rusts if you neglect it. Stainless (420, 3Cr13) resists corrosion and sharpens easily but won’t hold an edge as long. Neither is wrong. The full breakdown lives here.
- Sheath. This is where cheap and serious split. A good scabbard gives you a wire cutter and a sharpening stone. A budget one is a plastic holster. If you’ll actually field the thing, the sheath matters as much as the blade.
- Genuine vs clone. An Ontario is the real contract knife with the finish and steel to match. A clone gets you the look and the mount for a fraction of the price. Decide honestly which one you’re actually buying it for.
Final Thoughts
A bayonet is the one AR upgrade nobody needs, and that’s exactly why the honest buy matters: since you’re spending on want, not need, spend it right. Get the genuine, still-issued blade and buy once, or get the honest clone and know what it is. The trap is the middle, paying real-blade money for a costume piece because the listing photo looked mean.
For most people the Ontario M9 is the answer, the actual issued knife with the best sheath in the game. Watching your budget, the S&W SW3B is the value play. Finishing a retro rifle, the 494 M7 is the only correct choice. Then go check that your rifle even has a lug, mount the thing once for the photo, and get back to the range. Don’t own a rifle worth the bayonet yet? Start with our best AR-15s list.
FAQ
Will an M9 bayonet fit my AR-15?
It fits any AR-15 with a standard bayonet lug and enough muzzle clearance. Rifles with slim free-float handguards and low-profile gas blocks often have no lug, and 16-inch carbines drawn for 14.5-inch spacing may need a bayonet lug adapter for the muzzle ring to reach. Check for a lug before you buy.
Are bayonets legal to own?
In most of the US, yes, a bayonet is just a knife and legal to own. The wrinkle is that a few states treat a bayonet lug as a regulated feature on a semi-automatic rifle, so mounting one could matter where the rifle itself is restricted. Check your state’s rules. This isn’t legal advice.
What’s the difference between the M7 and the M9 bayonet?
The M7 is the older, smaller Vietnam-era pattern, a 6.7-inch spear point, lighter and simpler. The M9 replaced it in 1986 with a longer 7-inch blade, a sawback spine, and a scabbard that doubles as a wire cutter. The M7 suits retro builds; the M9 is the modern do-everything choice.
Is the Ontario M9 the same one the military issues?
Yes. Ontario Knife Company has held the US military bayonet contract for decades and builds the M9 to the same government spec it issues. Production moved after Ontario’s 2023 sale to Blue Ridge Knives, but it’s still the genuine contract pattern, made in the USA.
Do I need a special sheath or scabbard?
Every pick here ships with its own scabbard. The difference is what it does: the Ontario M9 and S&W SW3B sheaths include a wire cutter and sharpening stone, while budget picks come with a plain plastic or nylon holster. If you’ll actually use the blade, weigh the sheath as heavily as the knife.
What’s the cheapest bayonet that actually mounts?
The Wartech M9 at around $38 is the cheapest blade here that genuinely locks onto a standard bayonet lug. Just treat it as a light-duty and display piece: the 3Cr13 steel is soft and won’t take hard use. For a real working blade on a budget, the Smith & Wesson SW3B around $105 is the smarter spend.
Latest Updates
- July 2026: Full rebuild. Reworked the lineup to six in-stock, affiliate-available picks, dropped the discontinued Extrema Ratio Fulcrum, added the Ontario ownership context and 2026 pricing, and added a section on checking whether your AR even takes a bayonet.
Questions on a pick, or running a bayonet on a build we should see? Drop it in the comments. And if you’re still assembling the rifle, our best AR-15s and handguard guides are the next stops.
Keep the research going.
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Justin Trump is the managing editor and owner of CAT Outdoors. The son of a Vietnam veteran, he’s a Certified Glock Armorer, an avid gun enthusiast and 2A advocate. He holds two firearm patents for the CAT M4 and Talon tools. When not managing CAT Outdoors, he enjoys spending time with his family and friends, rooting for Michigan sports teams, and serving his church.
Spike machine makes AWESOME picatinny rail mount QD bayonets for modern AR’s, in lengths up to 12″.
I have reviewed them on my youtube channel.
m9 is the worst bayonet out there. I had over 200 in my arms room and they constantly broke. Better off with a $50 m7 AMZ clone. The wire cutter is f-ing stupid.