Ontario OKC3S USMC Multi-Purpose Bayonet (8.0 Inch Black Combo Blade) Brown Dynaflex Handle + Sheath 6504

MANUFACTURER: Ontario Knives (OKC)
MPN: 6504
Retail Price: $233.95
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The Ontario Knives Marine Bayonet knife is the military issue bayonet designed to Marine Corps Military specifications for attachment to M16 rifles carried by the Marines in Iraq. The Ontario Marine Bayonet knife features an 8 inch clip point blade made of proprietary carbon steel with a Rockwell hardness of 53-58. The blade is .200 inches thick and 1 3/8 inches wide, with a 1 3/4 inch Mission Serration, sharpened top swedge, and non-reflective black phosphate coat. The brown Dynaflex rubber handle is ergonomically grooved to reduce hand fatigue, with a positioning access point for quick redirect of the blade position in reduced visibility situations. The handle has an oval indentation with USMC on one side, and the Marine Corps logo on the other. The low noise multi-carry scabbard is made of brown molded polyester elastomer, with a ceramic coated aluminum honing rod on the back. The bayonet is held securely inside the scabbard by a fitted internal stainless steel spring friction device. The scabbard is equipped with two load bearing attaching straps with cross straps, which allows for multiple carry options. The brown handle, sheath and webbing are compatible with the digital desert camo colors. Overall length: 13 1/4 inch. Weight: 1.4 pounds.

Ontario Knives (OKC) - 6504 Specifications:

  • Overall Length:
    13.25 in.
  • Blade Length:
    8.00 in.
  • Cutting Edge:
    7.25 in.
  • Blade Thickness:
    0.20 in.
  • Blade Material:
  • Blade Hardness:
    53-58 HRC
  • Blade Style:
    Clip Point
  • Blade Grind:
    Flat Ground
  • Blade Finish:
    Black Zinc phosphate nonreflective finish
  • Edge Type:
    ComboEdge (1.75 in. mission serration)
  • Handle Length:
    5.25 in.
  • Handle Thickness:
    0.98 in.
  • Handle Material:
    Dynaflex® handle ergonomically grooved to reduce hand fatigue
  • Handle Color:
  • Weight:
    13.80 oz.
  • Carry Method:
    Polymer/Nylon Sheath
  • Knife Type:
    Fixed Blade
  • Brand:
    Ontario Knife Company
  • Model:
    USMC Marine Bayonet
  • Model Number:
    6504, OKC3S
  • Manufactured with a low noise signature polyester elastomer
  • Fitted internal stainless steel spring friction to secure bayonet
  • Ceramic coated aluminum honing rod located on back of scabbard
  • Equipped with two load bearing attaching straps with cross straps
  • Optional OKC3S compatible leg straps available
  • Made in USA
  • NSN:

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Your Rating: 5
Reno Johnny on 01/06/2022 04:57pm
As a former Marine, I always felt that I should have a bayonet. When I got an AR-15 with a bayonet lug, well, I couldn't help myself. It's BIG! It's sharp. It's awesome. The handle is comfortable. The finish (phosphate) and balance are perfect. The fit on my Bushmaster ORC is better than the M-7s I used in the Marines. We didn't have these, yet.

The Molle sheath needs five to six rows for attachment to a pack or vest. It will fit many different sized belts. There is a sharpening ceramic rod on the back of the sheath, too.

I would buy another one.
Andras Havas on 10/01/2021 11:15am
Non-reflective finish scratched from the sheath. Nice product.
Mark Mason on 03/25/2021 02:34pm
Manufacturing quality is outstanding. This knife is made to last a lifetime. I'll be mounting it on my Bushmaster AR-15.
Freddy Camarillo on 06/16/2020 04:44pm
I'm a new customer and interested in the Ontario OKC3S USMC Bayonet designed for M-16. Will it fit my Smith & Wesson MP Sport 2? Thank you
Freddy Fermin Camarillo on 06/16/2020 03:46pm
I would love to have the OKC3S USMC Bayonet. Will it fit on my Smith & Wesson MP Sport 2?
John on 11/04/2017 11:04am
Great go-to knife for all those chores in the field. Original GI issue, nuff said.
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I'll definitely 100% will be ordering from this company again many times in the future as the products arrived in a very quick amount of time during the holiday season which is always impressive. I will be a lifelong client of this company.
--Marc P. - Whitby, Ontario, CANADA

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