Windham Weaponry WW-15, AR-15 produced by former Bushmaster workers in Windham, Maine. 5.56 NATO with 16-inch barrel. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2011, USA Weight: 6.9 oz Overall length: 35" Status: Active Intended use: Tactical, Hunting