The Dual Cycle Rifle (DCR for short) is a machine revolver-type assault rifle that used a unique gas operation with a Webley-Fosbery-type grooved cylinder enabling 3-round burst capabilities at a rate of 4,900 rounds per minute.
The DCR was designed around 1969 and was an entrant into the Future Rifle Program, along with the AAI XM70 and possibly the Volley Firing Infantry Weapon. However, the program came under fire from the United States Congress, who deemed it "a waste of money", and was forced to be scaled down. Testing only began in 1974, but nothing was said of the DCR then and it was assumed to be shelved.
The DCR was designed as a weapon that could be as compact as possible while having the highest possible rate of fire. It has the ability to fire a three-round burst at 4,900 rounds per minute. Three rounds are loaded into the weapon simultaneously with one movement of the operating rod. The rifle uses a cam path, which pushes all three rounds into the three chambers in the cylinder. The cylinder advances once to fire the first round, and continues advancing until the third round is fired.