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M73 machine gun

From Wikipedia, the free encyclopedia
Machine gun
Machine Gun, Caliber 7.62 mm, M219
M219 Machine Gun
TypeMachine gun
Place of originUnited States
Service history
In service
  • M73: 1959
  • M73A1: 1970
  • M219: 1972
Used byU.S./NATO-aligned countries
WarsVietnam War
Production history
Designed1950s
Produced1950s–1970s
VariantsSeeVariants
Specifications
Mass
  • M73: 31 lb (14.1 kg)
  • M73A1/M219: 29.8 lb (13.5 kg)
Length48 in (1,219.2 mm)
Barrel length24 in (609.6 mm)

Cartridge7.62×51mm NATO
ActionRecoil-operated/short-recoil operation with gas assist
Rate of fire500–625round/min
Muzzle velocity2,800 ft/s (853.44 m/s)
Effective firing range984 yd (899.8 m)
Maximum firing range4,000 yd (3,657.6 m)
Feed systemBelt feed, left or right hand

TheM73 andM219 are7.62 mm NATO calibermachine guns designed for tank use. It is no longer in use by NATO countries. They were used on theM48 Patton andM60 Patton MBT series (including theM728 Combat Engineer Vehicle), as well as theMBT-70 prototype vehicles, and on theM551 Sheridan Armored Reconnaissance/Airborne Assault Vehicle (AR/AAV). They were also used in a twin mount in the turret of theV-100 Commando (M706) light armored car during the Vietnam War.

Design and development

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Designed primarily as a coaxial machine gun by theRock Island Arsenal and produced byGeneral Electric, the M73 was developed as a replacement for theM1919A4E1,M1919A5, andM37 machine guns that continued to serve in the immediate post-World War II environment.

TheMachine Gun, 7.62-MM, M73 was officially adopted in 1959. It is an air-cooled, recoil-operated machine gun, but also using cartridge gases to boost recoil. Though designed as a simplified alternative to the M1919 series, it is of almost identical weight. The weapon is fitted with a quick-change barrel, pull-chain charging assembly, and can be made to feed from the left or the right hand side (though the left-hand feed is more common).[1]

An attempt to make the M73 useful as a flexibleinfantry gun saw the weapon fitted with sights and apistol grip trigger as theMachine Gun, 7.62-MM, M73C. Equally unpopular, very few of these weapons were produced. Sources claim that it saw limited use in Vietnam.[2]

The M73 suffered from numerous malfunctions and was prone to jamming. An improved M73E1 was eventually developed in 1970 with a simplified ejection system, being type classified as theMachine Gun, 7.62-MM, M73A1. In 1972, it was decided that this weapon was sufficiently different from its predecessor and was redesignatedMachine Gun, 7.62-MM, M219. These weapons were eventually replaced by theM60E2 andM240 machine gun, and vehicles still in service using the M73 series were refitted with these weapons.[1][2]

Variants

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Drawing showing the differences between the M73 and M73A1/M219.

M73

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  • Adopted in 1959

M73C

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  • Flexible infantry variant with sights and pistol grip. Concept development. Never entered service.
  • Used a special tripod, the XM132. It was a standard M2 mount for the .30 cal. Browning M1919A4 with an adapter to fit the M73C.[1]

M73A1/M219

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  • Developed in 1970 as an improved version with simplified ejection mechanism attempting to reduce chronic jamming
  • Redesignated in 1972 as the M219

See also

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References

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Citations
  1. ^abcGary W. Cooke."M73, M73A1, M219 7.62mm Tank Machine Guns". Retrieved29 May 2013.
  2. ^abEzell, 1988. p. 418
Bibliography
  • Ezell, Ed.Small Arms Today, 2nd Edition. Harrisburg, PA: Stackpole Books, 1988.ISBN 0-8117-2280-5.
  • Gervasi, Tom.Arsenal of Democracy III: America's War Machine, the Pursuit of Global Dominance. New York, NY: Grove Press, Inc, 1984.ISBN 0-394-54102-2.

External links

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Machine guns
Heavy machine guns
Autocannons

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