Enhanced Carbon 15 with updated carbon fiber receiver features, improved ergonomics over the original, and a 16-inch lightweight barrel. The Type 97 designation reflected Bushmaster's internal development timeline. Same ultralight philosophy as the original with improved durability. Type: Rifle Action: Semi-Automatic Caliber: .223 Rem Capacity: 30 Year introduced: 1998, United States Weight: 56 oz Overall length: 32" Status: Discontinued Intended use: Recreational Shooting