Olympic Arms' 20-inch rifle-length gas system carbine in .223 Wylde chamber — a hybrid chamber that accepts both .223 Rem and 5.56 NATO ammunition safely while maintaining tighter tolerances than a standard 5.56 NATO chamber for improved accuracy. Type: Rifle Action: Semi-Automatic Caliber: .223 Wylde Capacity: 30 Year introduced: 2003, United States Weight: 112 oz Overall length: 39.5" Status: Discontinued Intended use: Target Shooting, Recreational Shooting