Это видимо один из самых продвинутых вариантов боевой винтовки Кольт сейчас. Предложение по индийскому контракту (проигравшее). As specified by the MCAR program requirements, Colt’s proposal was based on a 5.56mm rifle. The rifle design used for the base rifle was the Colt model R0923 Advanced Colt Carbine Monolithic (ACC-M) receiver system. The ACC-M design provided a true free-float barrel for increased weapon accuracy. The 7.62x39mm requirement was met by having a 7.62x39mm upper receiver assembly that could be installed onto the lower receiver of the 5.56mm base rifle. Colt manufactured a 7.62x39mm barrel that was compatible with the R0923 monolithic upper receiver. Both barrels were manufactured to United States Special Operations Command (SOCOM) barrel specifications. The 7.62x39mm SOCOM barrels that were used in the MCAR program are the only 7.62x39mm SOCOM barrels made by Colt. Both upper receiver configurations were able to mount an under-barrel grenade launcher. Как известно, выиграл наш Калашников, но там опять какие-то проблемы.