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The first official U.S. trench knife adopted for service issue was the U.S. M1917 trench knife designed by Henry Disston & Sons and based on examples of trench knives then in service with the French Army. The M1917 featured a triangular stiletto blade, wooden grip, metal knuckle guard, and a rounded pommel. The M1917 proved unsatisfactory in ...
The Mark I trench knife was replaced in Army service by the M3 trench knife in 1943 as well as old bayonets converted into fighting knives, [15] while the U.S. Marine Corps issued its own combat and utility knife the same year designated the 1219C2, later known as the USMC Mark 2 combat knife aka the USMC knife, fighting utility. [16]
A bayonet or knife with three cutting edges; A helicopter rotor having three blades; A blade server module of the IBM Roadrunner supercomputer
Designed for rapid production using a minimum of strategic metals and machine processes, the M3 trench knife used a relatively narrow 6.75 in (17.1 cm) bayonet-style spear-point blade with a sharpened 3.5 in (8.9 cm) secondary edge. [6] [7] [4] [8] [9] [5] The blade was made of carbon steel, and was either blued or parkerized.
This singleness of purpose originally distinguished the fighting knife from the field knife, fighting utility knife, or in modern usage, the tactical knife. The tactical knife is a knife with one or more military features designed for use in extreme situations, which may or may not include a design capability as a fighting or combat weapon. [ 6 ]
The M7 bayonet, introduced in 1964, was used as a bayonet on the M16 rifle, M4 carbine, and as a fighting knife. The M9 multipurpose bayonet system is used as a bayonet on the M16 series rifle, on the M4 series carbine, as a fighting knife, as a general field and utility knife, as a wire cutter when used on the sheath, and as a saw.
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The stiletto blade was approximately 0.25 inches (0.64 cm) longer than the Fairbairn-Sykes fighting knife and considerably thinner. It is believed that thinner design was a manufacturing compromise, rather than an attempt to increase the effectiveness of the blade. [8]