USGI M9 Bayonet

The M9 Bayonet from OKC is a USGI issued bayonet for the M16 rifle. Officially adopted in 1986, the M9 is a great improvement on the earlier M7 bayonet. With production numbers approaching 500,000 the M9 bayonet is a true battle tested bayonet that can double as a fighting knife.

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SKU N6220

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The OKC M9 Bayonet is a USGI Bayonet for the M16 Rifle. Based on the Phrobis III designed by Charles Finn, the M9 continues to see service in Iraq and Afghanistan.


  • Sheath doubles as a wire cutter
  • Black Oxide Non Reflective Finish
  • Quick Detach Clips on Sheath
  • Serrated Spine on Blade
  • Official Bayonet of the US Military
  • Lifetime Warranty from Ontario Knife Company


  • Lock Type: Fixed
  • Edge Type: Combo
  • Hardness: 53-57 HRC
  • Country of Origin: USA
  • Sheath Material: Glass Filled Nylon
  • Sheath Color: Olive Drab
  • Sheath Type: Bianchi Clip
  • Handle Color: Olive Drab
  • Blade Grind: Flat
  • Blade Finish: Zinc Phosphate
  • Blade Color: Black
  • Blade Thickness: 0.24 Inches
  • Blade Material: 420 Mod Stainless Steel
  • Blade Length: 7 Inches
  • NSN#: 1095-01-227-1739
  • Overall Length: 12.25 Inches

More Information

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Customer Reviews

Good, sturdy knife
Review by Shaquilla K.
Verified Buyer
This bayonet fits on my S&W Mp-15 perfectly. It's a nice addition to the weapon and looks really cool! It also shipped quickly and came earlier than the estimated delivery date. I would definitely recommend to anyone looking to add to a fixed blade collection, military nostalgia, add a cool factor to their AR, or someone who wants a durable field knife.
Exactly what I was issued in the Army
Review by Yousef E.
Verified Buyer
This is the exact make / model bagonet that I was issued when I was emlisted in the U.S. Army which is why I ordered it. Through my years of service, this knife never failed to impress me. It once got my hummer unstuck from a roll of C wire wrapped around the front wheel by using them as. wire cutters with the sheath. The only reason I'm not giving this item 5 stars is because it didn't come very sharp and required sharpening.
M9 bayonet with scabbard
Review by Letisia P.
Verified Buyer
Shipping time right on the money. I was 11 Bravo in the army and had the same exact bayonet and scabbard. The purpose of this knife is to be durable and do the job it was designed to do. Cut tin , wood , pry things apart . At the same time it must be heavy enough to perform combat and ruin their day , hopefully end it if possible. This knife is built to last , and serve a specific purpose. I guarantee it will serve that purpose for a life time if not two. Well built , quality steel , and properly taken care of will be around for generations to come . For its purpose , it's the real deal. Nice cutter and saw teeth that will come in handy. You will sacrifice weight but have confidence this will get the job taken care of. Killer buy .
The Real McCoy
Review by Marcis G.
Verified Buyer
The same one I used in the Army for 10 years. Heavy duty and all-around good utility and survival knife. A little heavy in weight for individuals use to inexpensive or short-lived knives which break or fall apart quickly. This one will last you the rest of you life with a little maintenance and care.
Perfect Army Guy Gift
Review by Kima E.
Verified Buyer
Got this for the hubby, had it engraved for his 33 year career Army O job. Perfect, high quality, engraved easy on the blade.
It is the real deal, great quality
Review by Willia B.
Verified Buyer
Purchased as a nostalgia/collector piece from my Army days. Bayonet and scabbard are in great brand new condition. The blade was plenty sharp and oiled. Ontario does a great job.
Solid bayonet
Review by Bert J.
Verified Buyer
This is a solid military specification bayonet. Anyone who has spent anytime collecting or purchasing a contracted model design over a period of years between the same manufacturer or different manufactures knows there can be significant to slight differences in quality and appearance. The M9 is no exception in my experience with military items. Is there better in the M9? Yes, I can not argue against the BUCK made M9, but more than likely you will pay premium price for what I would call the perfect M9 example. Then there is Lan-Cay which appears to me to fall into and with Ontario, but you will find that slight quality difference in years compared to others. No, not going into each manufacturer, but still want to briefly touch on my reasoning for this review. Functionally, most, if not all will do the job and it comes down to current production new, new old stock, or used and your price point. Certainly there are the china knock-offs, but if you want the real deal and something that will hold value, reliable, and proven - go authentic military issued. I would also recommend supporting US made products if at all possible. Some of the past Lan-Cay seem to have a better finished look - yet some do not. Ontario seems to fit the same ups and downs in the cosmetic department. I have not even come close to owning all years or sampled production runs, but the Ontario I just purchased new seems to be about or a hair above average. The blade is nice overall, but you will see the milling marks (lined scratches) running deeper. The mfg markings move up and down a little and on some, the USA is not completely visible (per other pictures). Now, the black finish on the blade appears weak. Right out of the box, there is wear marks and handling oops - marked up and missing finish. Finish could be improved. The other components seemed to be press stamped with un-refined edges - this seems typical with most of the bayonets I have come across from many models/eras. But, I'm getting picky here - its still a fine item overall and everything is still quality with decent looks. Feels great in the hand and some heft as well. The sheath is solid and can't take anything away - assembly looks good, no initial damage noticed. Yes, the wire cutter is there ... although I have not personally tested - you can find plenty of praising remarks from online video reviews. This current Ontario M9 represents a solid representative military specification item. The hardest choice may be more in choosing used or surplus over retail factory new out-of-box. So I urge you to consider end use and value in cosmetics. Utility wise - I understand why the M9 is here.

In short, I purchased mine for use with my AR15 style rifles. I wanted better cosmetics when compared to used and those that may have been unissued and rattled around in a bulk box. Yes, more preparedness than actual day to day use. Perhaps collector as well. I could not justify the price of BUCK and the knock offs just do not appeal to me. Ontario has been around as long as I can recall (just say many many years) and that says something too. Thanks for reading my review.
perfect addition
Review by Tarron Z.
Verified Buyer
Bought this to add to my knife collection. Fits my m4 rifle nicely. Heavy knife and sheath. Could be a great bushcraft knife for hiking/ camping. Just a little heavy to backpack with. All in all very pleased with it
Got it for no particular reason
Review by Sofia L.
Verified Buyer
Just wanted a bayonet for my AR and my Mossburg 590a1. Now when Feinstein says "what do you need a bayonet lug for", I can say "for my bayonet!". Black one is more expensive, I didn't see a reason for pay extra. The green one is fine. I'm not trying to be a tactical ninja, it's just for fun.
Great knife
Review by Dezire F.
Verified Buyer
This is the real thing. I do wish the blade was longer or the lug was closer to the muzzle. For maximum stabbing, of course.
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