Original Military & Police AR-15 with chrome-lined barrel, 16-inch mid-length gas, and M4 furniture. S&W's entry into the modern sporting rifle market. Type: Carbine Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 15 Year introduced: 2006, USA Weight: 112 oz Overall length: 32" Status: Active Intended use: Law Enforcement, Sport Shooting, Home Defense