Windham Weaponry's 20-inch SRC is the full-size rifle configuration of their flagship AR, built to original A2 specification with a rifle-length gas system and A2 buttstock. The 20-inch chrome-lined barrel delivers maximum 5.56 NATO velocity and extends the cartridge's effective range compared to carbine configurations. Built in Windham, Maine by the original Bushmaster workforce. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2012, USA Weight: 66 oz Overall length: 39.5" Status: Active Intended use: Target Shooting, Hunting, Home Defense