US Navy Mark 3 Mod 0 Knife

The US Navy Mark 3 Mod 0 is the exclusive fighting knife of the US Navy. The Mark 3 fighting knife is battle tested and easily recognized by the long service life of this knife. Included with each Mark 3 Mod 0 fighting knife is the correct sheath and a lifetime warranty from Ontario Knife.

In stock

SKU N6141


The US Navy Mark 3 Mod 0 knife is a multi-purpose fixed blade fighting knife. Issued to all sailors in the US Navy, the Mark 3 is capable of serving as a dive knife, fighting knife, or utility knife.

  • Serrated Saw Edge on Spine
  • Striking Butt Can Be Used as Hammer
  • Checkered Grips
  • USN Marked On Grips and Sheath
  • Official Knife of the US Navy SEALS
  • Made in the USA
  • Lifetime Warranty from Ontario Knife Company
  • Blade Edge: Plain
  • Blade Hardness: 49-54 HRC
  • Sheath Material: Molded Plastic
  • Sheath Color: Black
  • Sheath Type: Belt Clip
  • Handle Color: Black
  • Blade Grind: Flat
  • Blade Finish: Oxide
  • Blade Color: Black
  • Blade Thickness: 0.17 Inch
  • Blade Material: 440A Stainless Steel
  • Blade Length: 6 Inches
  • NSN#: 1095-00-391-1056
  • Overall Length: 10.75 Inches

More Information

Brand Ontario Knife Company
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Customer Reviews

That's the real deal!
Review by micha4724
Verified Buyer
That's the real deal! A straightforward knife, tough MF. No blings or decoration, all black, arrived very sharp. The sheath is excellent and holds the knife perfectly secured and tight. I had a KaBar, Sog, Esee, Tops, and many others. This one is a working horse that will do any job from stubbing, batoning, diving(put tons of oil), prying, slicing, rope cutting, hunting, and household chores. The pommel is great as a hummer and glass breaking. This one you can abuse and enjoy it
The one and only...
Verified Buyer
There are a lot of companies that have made the claim that their knife is the "Official Knife of the US Navy SEALS", but the Mk3 Mod O is the only knife issued to BUDS graduates. A stout piece of steel. A true survival knife. The lanyard and leg tie downs are the only weak points. They're basically lightweight shoelaces and should be replaced with something more durable like paracord.

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