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.

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Ontario Knife Company


  1. US Navy Mark 3 Mod 0 Knife
  2. Authentic US Navy Seal Dive Knife
  3. Serrated Saw Edge on Spine
  4. Striking Butt Can Be Used as Hammer
  5. USN Marked On Grips and Sheath
  6. Blade Length: 6 Inches
  7. Blade Material: 440A Stainless Steel
  8. Blade Hardness: 49-54 HRC
  9. Overall Length: 10.75 Inches
  10. NSN#: 1095-00-391-1056
  11. UPC: 071721061410
  12. Made in the USA
More Information
Overall Rating
Bigger and better than the mk2
Review by Keepshooting Customer
This knife, the big feller with the nylon washer, and sharpened it to the point of the swedge. She was real happy with it, she said, "wow! I could cut somebody to ribbons with this." So we cut 3 more out of cedar for christmas presents for the girlfriends, (who I thought would get pissed, as usual, but they loved them too). The hangers on them do work well as pry bars. Not exactly practical for field use, since you got to be just the right shape to hang from the belt, but I've had mine for about 20 years and it has a big spot on the back, and some corrosion in a few spots, still the tool it has made me is well worth the very small use and wear. One other thing to consider is that Ontario made these and a different company sold under Ontario name sold a slightly smaller knife. The 6-1/2" which came as one, maybe two, sizes in the bag from Galls had to have been marked as having been produced by Ontario, I have several from this one source, but all marked either as MADE IN USA or stamped 4-1/2". They're fine as gifts, but for yourself get the 7-1/2".
Overall Rating
Review by Keepshooting Customer
One of the best knives i have ever bought, worth the price and then some, used for heavy duty cutting, chains, ropes and heavy foliage
Overall Rating
Review by Keepshooting Customer
Overall Rating
Very tough knife
Review by Keepshooting Customer
Tough knife! Ontario stopped the one piece grip but you can still find it for a little extra. This was a big knife for me. This has the same bayonet scabbard the 496c bayonet has. Very happy with it and the serrations do not get damaged easily. High carbon phosphate steel.
Overall Rating
Great Buy. Cut like a Razor.
Review by Keepshooting Customer
The Best all-around Knife you can buy and buy at this Price is the USN Seal Knife, by Ka-Bar in New York. If the S/M, Seal Model (Not as sharp), if MK3 NAVY (Not as tough, if blade is not serrated, then this Military Knife.
Overall Rating
Review by Keepshooting Customer
It is not what I had expected but its AMAZING!!! SPEC OP FOR SURE, its a beast! Amazing design!! I really dont see how they charge $120 for it!! I cant wait to test it out!
Overall Rating
Review by Keepshooting Customer
Just as described! Sharp as hell right out of the box. Ontario made this model in USA up until about 2010.
Overall Rating
I've been using the U.S. Navy MK3 K&T Knife for 30+ years now. They have a
Review by Keepshooting Customer
OK, let's get to it: I've been using the U.S. Navy MK3 K&T Knife for 30+ years now. They have a great reputation, well earned, for one heckuva knife! And now, for those of us "retired military", for whatever our situation might be, is a Knife well suited to us, to say the least.
Overall Rating
Review by Keepshooting Customer
The item is the exact same as the old KBD knife that was my issue in 1974 except that this one has black phosphate painted blade instead of unpainted stainless blued blade. This change was probably made to increase the resistance to corrosion from sea water and brine. The knife is tough but somewhat difficult to sharpen due to hard carbon steel used. All in all a good buy for someone who has already decided to not go plastic handle and cheap blade for their issue.
Overall Rating
Five Stars
Review by Keepshooting Customer
Great knife!
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