The Windham Weaponry 20″ Government Rifle is semi-automatic and chambered in .223 Remington/5.56 NATO. It features an A2 solid stock with a trapdoor storage compartment, rifle length fiberglass handguard with aluminum heat shield, A2 plastic grip with finger groove/checkering and a M4A4 type flat top upper receiver with detachable carry handle. The 20 inch barrel is chrome-lined with a 1 in 7 right handed twist rate. The rear sight is A4 dual aperture and has elevation and wind adjustments 300-600M. The front sight is an adjustable height square post in an A2 standard base. This rifle comes in a hard plastic gun case with black web sling.