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The Colt ACR was Colt's entry in the U.S. DoD
The Colt ACR was Colt's entry in the U.S. DoD Advanced Combat Rifle
The Advanced Combat Rifle (ACR) was a United States Army program, started in 1986, to find a replacement for the M16 assault rifle. Under the stress of battle the average soldier with an M16 may shoot a target at 45 meters, but hit probability is ...
program, which concluded with the result that none of the entrants achieved enough of an improvement over the M16
The M16 rifle (officially designated Rifle, Caliber 5.56 mm, M16) is a family of military rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56×45mm automatic rifle with a 20-roun ...
to be worth the cost.
The Colt ACR was not a total loss, however; the scope went on to be offered by Elcan as the C79, a version of which was eventually adopted as the M145 Machine Gun Optic used on a number of firearms, especially those from Diemaco
Diemaco was a Canadian defence company based in Kitchener, Ontario
)
, image_flag = Flag of Kitchener, Ontario.svg
, image_seal = Seal of Kitchener, Canada.svg
, image_shield=Coat of arms of Kitchener, Canada.svg
, image_blank_em ...
(now Colt Canada
Colt Canada (formerly called Diemaco) is the Canadian division of American firearms manufacturer Colt located in Kitchener, Ontario, Canada.
The facility produces small arms for the Canadian Armed Forces, Canadian law enforcement agencies In ...
).
Overview
The main differences of the Colt ACR and the M16A2 is the distinctive furniture. The handguard included a heat-resistant inner lining, vent holes for lightening and air cooling with a thickened ring around the front end to act as a handstop. This was topped with an elevated sight track rib with a white stripe to improve fast target acquisition. The pistol grip was longer and of a different profile than a traditional M16A2, and the rifle featured ambidextrous fire control selectors, removable scope and a streamlined 6 position telescopic stock. Lastly the rifle featured a flash-hider and a Muzzle Brake Compensator (MBC) designed to reduce recoil and compensate for muzzle climb. The World's Assault Rifles By Gary Paul Johnston, Thomas B. NelsonHogg, Ian V. Jane's Infantry Weapons 1994-1995. Jane's Information Group. 1994 Internally, an oil spring buffer was added to the lower receiver to control the cyclic rate and help reduce felt recoil. Combined with the MBC, these changes reduced felt recoil by 40 per cent compared to a standard M16A2.Ammunition
The key design change was the use of " duplex rounds", a single cartridge with two bullets in it.Olin Corporation
Olin Corporation is an American manufacturer of ammunition, chlorine, and sodium hydroxide. The company traces its roots to two companies, both founded in 1892: Franklin W. Olin's Equitable Powder Company and the Mathieson Alkali Works. Olin che ...
produced three different rounds for testing, the first consisting of two tungsten
Tungsten, or wolfram, is a chemical element with the symbol W and atomic number 74. Tungsten is a rare metal found naturally on Earth almost exclusively as compounds with other elements. It was identified as a new element in 1781 and first isol ...
projectiles in a long-necked case, the second used a standard-length case with two , tungsten projectiles, and the final entry was another standard-length case with two projectiles, one the other . The latter was eventually selected for submission to the ACR trials. The basic idea of the duplex load is to increase the number of projectiles fired, which is the primary determinant of battlefield casualties. However, they significantly reduced accuracy, leading to a maximum effective range of and requiring the user to also carry traditional ammunition for long-range shots.
See also
*AAI ACR
The AAI ACR was a prototype flechette-firing assault rifle built for the US Army's Advanced Combat Rifle program of 1989/90. Although the AAI design proved effective, as did most of the weapons submitted, the entire ACR program ended with none o ...
* Steyr ACR
The Steyr ACR was a prototype flechette-firing assault rifle built for the US Army's Advanced Combat Rifle program of 1989/90. Although the Steyr design proved effective, as did most of the weapons submitted, the entire ACR program ended with no ...
* HK ACR
* Colt Automatic Rifle
The Colt Automatic Rifle or Colt Light Machine Gun is a 5.56 mm NATO, open-bolt, full-automatic-only firearm developed by Colt Defense. It is based on the M16A2/A4, and has a distinctive squared-off handguard, vertical grip, carrying handl ...
* Project Abakan
Project Abakan was a Soviet/Russian advanced assault rifle program in rival to the US Advanced Combat Rifle that took place between 1980 and 1994.
History
The 1960s ushered a new generation of assault rifles with the introduction of smaller ca ...
* Buck and ball
Buck and ball was a common load for muzzle-loading muskets, and was frequently used in the American Revolutionary War and into the early days of the American Civil War. The load usually consisted of a .50 to .75 caliber round lead musket ball t ...
* List of assault rifles
An assault rifle is a rifle that uses an intermediate cartridge, a detachable magazine, and can switch between semi-automatic/ fully automatic fire. Assault rifles are currently the standard service rifles in most modern armies. Some rifles lis ...
References
{{DEFAULTSORT:Colt Acr Assault rifles of the United States Colt rifles Trial and research firearms of the United States ArmaLite AR-10 derivatives