Ontario Knife OKC3S Bayonet, 6504

Ontario Knife - OKC
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(15 reviews)
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The Ontario Knife 6504 OKC 3S Bayonet is a fixed blade bayonet and one of the few American made bayonets available today AND is sold to the United States Marine Corps. The 8" combination edge blade is solid with a .200" blade thickness and a flat bevel with secondary flat bevel grind and an HRC of 55-57. A zinc phosphate finish over the 1095 carbon steel blade is sure to keep the blade of this Ontario Knife 6504 OKC 3S Bayonet sharp and in good working condition. The Ontario Knife 6504 OKC 3S Bayonet is complimented by a little over 5" modified brown Hytrel® handle. The Ontario Knife 6504 OKC 3S Bayonet is a bit larger than the M7 Bayonet and comes in at 13.3" in overall length. The Ontario Knife 6504 OKC 3S Bayonet comes complete with a tan Molle Compatible Sheath.

Ontario Knife 6504 OKC 3S Bayonet Snapshot:

  • OKC 3S Bayonet Blade Length: 8""
  • OKC 3S Bayonet Thickness: .200"
  • OKC 3S Bayonet Blade Grind: Flat Bevel w/secondary flat bevel
  • OKC 3S Bayonet Blade Material: 1095 Carbon Steel
  • OKC 3S Bayonet Blade Finish: Zinc Phosphate
  • OKC 3S Bayonet Blade HRC/Hardness: 55-57 HRC
  • OKC 3S Bayonet Handle Material: Hytrel
  • OKC 3S Bayonet Handle Length: 5.3"
  • OKC 3S Bayonet Handle Color: Brown
  • OKC 3S Bayonet Overall Length: 13.3"
  • OKC 3S Bayonet Carry System: Tan Molle Compatible Sheath

The Ontario Knife OKC 3S Bayonet is made in the U.S.A.

A note from Ontario Knife about their Bayonets: "Ontario Knife Company is one of the few remaining American bayonet manufacturers and the sole source of the combat deployed OKC3S bayonet. Complementing our legacy of military issued bayonets, which include the M9 and the storied M7, Ontario Knife's tactical blades include the Air Warrior Program's ASEK survival knife, the Freedom Fighter, OKC's Kukri, and the Navy-issued Mark III."


  • 4

    Posted by MARPAT on Jul 2nd 2021

    Reminds me of my service issue bayonet. It's exactly the same in every aspect. It took awhile but I got it in over a month. Also the blade came dull. Maybe ontario knife is churning these out too fast. I recommend it!

  • 5
    Excellent Combat Knife

    Posted by DC Smith on May 24th 2021

    Durable and as tough as the USMC's that carry them

  • 5

    Posted by Corporal Brent Severson 0311/USMC on May 11th 2021

    This bayonet is a must have if you have a bayonet lug on your primary weapon! It will effectively cause vital damage to anywhere you apply it, maiming and killing your enemy with true marine proficiency allowing you to stack up more kills, faster than your teammates who decided to forego such an awesome piece of equipment. Ooh rah! Semper Fi!

  • 4
    Great product, bad packaging

    Posted by Robin on May 6th 2021

    I'd give this product 5 stars, but it came damaged due to poor packaging. The sheath and knife are allowed to rub against each other and slide around the box, scratching up the sheath. This was supposed to be a display piece. To make matters worse they never responded to my complaint email. It wouldn't cost anything to wrap the sheath in some foam or even packing paper...something.

  • 3

    Posted by Josh on Apr 16th 2021

    The listing did not show the item back ordered when I ordered in December. I received the item in April. When I received the blade the finish looked chalky and poor, I was initially upset, I oiled the blade and the finish normalized. The knife arrived with very noticeable burring along the serrations and the fine edge. The grind was quite uneven along the curve of the blade, and the blade was not very sharp. Quick work on some diamond stones brought the sharpness back and I deburred the serrations. I am less than pleased with the initial unboxing, but after showing some love to it it has shaped up well. I hope the ones they make for our Marines are finished better than mine.

  • 5
    OKC3S Bayonet, I love it.

    Posted by Yovel Gonzalez on Apr 15th 2021

    It will take time for the product to be delivered, but once it got here I fell in love with it. I am not a knife expert or anything so i cant give an in dept review. But as a person who wanted a really good bayonet, I am very happy with this product.

  • 5
    OKC 3S Bayonet

    Posted by Andrew on Apr 15th 2021

    Probably the best blade you can have in terms of its materials, durability, and appropriate geometry for stabbing and slicing.

  • 4
    Marine bayonet

    Posted by Jerry Jocoymar on Oct 14th 2020

    It's a good-looking well-made bayonet but it does not come very sharp probably worse than most machetes come but I put a good Edge on it but as soon as I got it I haven't been able to get it razor sharp like I like it though. That's the only reason I gave it four out of five stars...

  • 5
    Excellent material, workmanship. Very pleased.

    Posted by Daniel E Betts on Sep 12th 2020

    Will recommend to others.