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Ontario Mark 3 Navy (MKIII) Combat Knife (1960)

Authored By Staff Writer | Last Updated: 2/15/2012

The Mark 3 Navy Knife is utilized exclusively by the United States Navy.

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While the dagger proved critical to assassinations and close-in fighting throughout ancient history, it still served a purpose on the high tech battlefield of today as the "combat knife". The combat knife is the warfighter's last line of defense and can also serve as a personal ally of sorts when attempting to survive apart from his/her squad or Forward Operating Base (FOB). For the United States Navy - and the United States Navy SEALs for that matter - the Ontario Mark 3 Navy (MKIII) combat knife fulfills this purpose (it is also known by the name of "Ka-Bar"). The Mark III - in its current form - has been in US military service for over 50 years and is American-made by the Ontario Knife Company of New York - in business since 1889.

The heart and soul of the Mark 3 is its fixed 6.5-inch blade which is designed to stab, slash and cut. The main edge and clip edge are plain while the spine sports a series of saw-like teeth. The two edges meet at a defined point at the tip of the blade which is capable of easily managing canvas or even leather. The blade is manufactured of 440A stainless steel with a black oxide finish so as to not showcase any glint. The grip handle is well patterned for a sure hold and, like the included sheath, is of a molded high impact plastic. The handle also sports a flat face for smashing. A short strap can be affixed to the base of the handle through a provided loop. Construction is such that the knife may very well last a long time, if not outliving its owner, and - due to its intended use at sea and underwater - is specifically engineered from materials that will not suffer from the corrosive effects of the sea. Overall length is 10.75-inches with the blade being of .165" thickness.

Beyond its expected uses, the Mark III can prove a soldier's best friend when used as an ad hoc mallet, anchor or prying tool...essentially limited only to the imagination and circumstances at hand - though within reason of course.
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MilitaryFactory.com does NOT sell equipment/weaponry. Material presented throughout this website is for historical and entertainment value and should not to be construed as usable for hardware restoration, maintenance or general operation. Please consult manufacturers for such information. Our disclaimer. Email corrections / Comments to MilitaryFactory at Gmail dot com.
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Specifications for the
Ontario Mark 3 Navy (MKIII)
Combat Knife


Country of Origin: United States
Manufacturer: Ontario Knife Company - USA
Initial Year of Service: 1960


Overall Length: 273mm (10.75in)
Barrel Length: 0.00mm (0.00in)
Weight (Empty): 0.62lbs (0.28kg)


Cartridge: Not Applicable
Action: Manually-Actuated
Feed: Not Applicable
Sights: Not Applicable


Variants:
Ontario Mark 3 Navy (MKIII) - Base Series Designation.


Operators: United States

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