The Gerber Mark II is a fighting knife manufactured by Gerber Legendary Blades from 1966 to 2000, with an additional limited run of 1500 in 2002,^[1] and full production resuming as of July 2008.^[2] It was designed by retired United States Army Captain, Clarence A. “Bud” Holzmann, who based the pattern on a Roman Mainz Gladius.^[1][2]

At 12.75 inches (32.39 cm) long it has a 6.5 inch (16.5 cm) 420 HC stainless steel double edged spear point wasp-waisted blade, weighs 8 ounces, and has a die cast aluminum handle.^[3] It has a distinctive look similar to that of the Fairbairn–Sykes fighting knife developed during World War II for the British Commandos.^[4] The Mark II was commonly carried by troops for the United States in the Vietnam War, and was second only to the Ka-Bar knife in fame.^[4]

The MK II was the suggested blade in Paladin Press's controversial how to book, Hit Man: A Technical Manual for Independent Contractors.^[5]

During the Vietnam War, the first production run of this knife had a five degree offset between the blade and the grip in order to ride in the sheath more comfortably, and give the user a grip similar to that of a fencing foil.^[1][2] This design feature led to a significant number of knives being returned by users for having a "bent blade", so Gerber discontinued that element on subsequent production runs.

In the 1970s, the military's base/post exchanges discontinued selling these knives, reasoning that they were "not in good taste" or "too brutal".^[4] Al Mar, then working for Gerber as a knife designer, added the sawtooth serrations toward the hilt, marketing the knife as a "survival aid", making it more appealing to the PX System, which resumed selling the Mark II as a survival knife, rather than a fighting knife.^[4]

Gerber manufactured a scaled down version of the Mark II known as the Mark I. The Mark I had a 4.75 inch (12 cm) blade and was marketed as a boot knife.^[6]

• The Mark II gained additional fame when it was used by Mel Gibson in his role of Max Rockatansky in the film of 1981, The Road Warrior.
• The black coated blade model of the Mark II was used during the mess hall knife game scene in the science fiction film Aliens.
• The film Captain America: The Winter Soldier (2014) features the Winter Soldier using a Mark II in a fight with Captain America.
• During a scene in Man of Steel (2013), Colonel Nathan Hardy (portrayed by actor Christopher Meloni) uses a Mark II in an attempt to fight the Kryptonian lieutenant Faora Hu-Ul, before Superman intervenes.
• Casey Ryback (Steven Seagal) uses a Mark II throughout the film Under Siege (1992) most notably during the finale against William Strannix (Tommy Lee Jones)

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• List of individual weapons of the U.S. Armed Forces
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