Compare Ontario 6141 MK 3 Navy Knife (Black)

Ontario 6141 MK 3 Navy Knife (Black)Buy Ontario 6141 MK 3 Navy Knife (Black)

Ontario 6141 MK 3 Navy Knife (Black) Product Description:



  • 6 inch plain edge blade
  • Knife Closed Length: 3.3-Inch
  • Knife Open Length: 10.75-Inch
  • Weighs 10 ounces
  • Made of 440A Stainless Steel

Product Description

The Ontario Knife MK3 Navy knife is the current military issue knife to the U.S. Navy. Situated in New York State's scenic Southern Tier, Ontario Knife Company produces one of the most comprehensive, wide-ranging product lines in the cutlery industry today. While being a worldwide supplier, the Ontario Knife Company is also a major supplier to the U.S. Government and its military. Ontario has built its reputation on a heritage of uncompromising craftsmanship, quality materials and components, and a steadfast commitment to its workforce. Black oxide finished stainless steel blade. Molded high impact black plastic handle. Includes molded plastic sheath. Blade has a hardness of 49-54 HRC. Sheath is equipped with a brass belt hanger and loop.

Customer Reviews

Most helpful customer reviews

9 of 10 people found the following review helpful.
5One world class knife
By petey
I have owned this knife for ever. It holds a good edge , not sure what the blade material is - i have read its 440 SS , nothing more specific than that. The blade is thick for prying. I would never use it for that but its thick enough to out pry most combat tactical knives even though its technically a dive knife. The saw on top is ok, it has a saw edge on the very top and then at a slight angle and wider going down the side. May be good for under water rope ??? The flat blunt butt of the knife provides a solid smack to whatever your applying it to. The handle is good, fatter in the middle and can be held firmly with force but i think its not as good as more modern stuff in term of feeling "grippy" when moist. it is however one of the toughest handles i have seen. The sheath is good but very thick at least an inch and it has metal that hold the knife in place - its a piece of springy metal pushing against the blade. its not the best choice because it rubs against the blade and makes noise when drawing it but it is secure. you would have to flick it about full speed to eject the knife from the sheath. The best part !! the point, a bit too pointy for some people (gets pretty thin)it will puncture with ease thick leather or canvas. Over all this is the best quality knife i have in term of durability and toughness.

9 of 10 people found the following review helpful.
5One word class knife
By petey
I have owned this knife for ever. It holds a good edge , not sure what the blade material is - i have read its 440 SS , nothing more specific than that. The blade is thick for prying. I would never use it for that but its thick enough to out pry most combat tactical knives even though its technically a dive knife. The saw on top is ok, it has a saw edge on the very top and then at a slight angle and wider going down the side. May be good for under water rope ??? The flat blunt butt of the knife provides a solid smack to whatever your applying it to. The handle is good, fatter in the middle and can be held firmly with force but i think its not as good as more modern stuff in term of feeling "grippy" when moist. it is however one of the toughest handles i have seen. The sheath is good but very thick at least an inch and it has metal that hold the knife in place - its a piece of springy metal pushing against the blade. its not the best choice because it rubs against the blade and makes noise when drawing it but it is secure. you would have to flick it about full speed to eject the knife from the sheath. The best part !! the point, a bit too pointy for some people (gets pretty thin)it will puncture with ease thick leather or canvas. Over all this is the best quality knife i have in term of durability and toughness.

8 of 10 people found the following review helpful.
4A Very Good General Purpose Field Knife
By Bill W. Cunningham
I got a Mark 3 about a month ago. It is not a sexy, special forces type knife. But it takes an edge well, and is strong and durable. Also, being made of stainless steel and plastic, it is impervious to sea water. If I had to pick 2 bones with this knife, I would replace the sawtooth top edge with a serrated edge. This would be better for cutting rope, etc. And the knife came coated in cosmoline, which I feel is unnecessary, messy, and stinky.

See all 12 customer reviews...


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Buy Ontario 6141 MK 3 Navy Knife (Black)