Steyr ACR was the Steyr-Mannlicher entrant for the U.S. Advanced Combat Rifle competition. It was considered an excellent example of modern technology, but it could not reach the 100 percent improvement over
The Colt ACR was Colt’s entrant for the Advanced Combat Rifle program. It was quite simply, a progressive improvement upon their existing M16A2 service rifle, but designed to fire a new duplex