The Ontario Mark III Navy Knife features a 440A stainless steel blade with a black oxide finish and a molded high impact plastic handle. Overall, the Mark III Navy Knife is 10.75" long, consisting of a 6.5" blade that is .65" thick. The Mark III Navy Knife sheath is also a molded high impact plastic that is equipped with a brass belt loop and hanger.
The Ontario Mark III Navy Knife is used exclusively by the United States Navy.
Posted by Justin Case on 26th Jul 2011
Forget sharpening it to a fine edge, it's not a knife for that. This knife is made for puncturing and causing damage, right?
it's a (real...) military knife serving a fairly different purpose than most people would use them for.
Love mine, got it as a factory second.
Posted by Barsby on 4th May 2011
I have owned my Ontario MK-3 for about 15 years. I love most of the Ontario knives, with the exception of the MK-3 Navy Knife. It's grind has a very poor angle, which makes it IMPOSSIBLE to put a sharp edge on it. I have been trying various products over the years, such as Arkansas stones and Diamond stones, but nothing works. It doesn't even make a good butter knife. BUT, it does look very cool in the movies. :)