Complete stock kit for .223/5.56 A2 builds. Featuring a black polymer fixed A2 stock with a 5 piece fixed buffer tube kit. Black Polymer A2 Style Fixed Butt Stock Sturdy black polymer featureless fixed butt stock in A2 style. Fits mil-spec fixed buffer tube. Rubber recoil pad attached, hinged trap door in stock for storing accessories like a cleaning kit, batteries etc. Integrated sling loop. A2 Fixed Buffer Tube Kit A2 Buffer Tube Kit Includes A2 Buffer Tube; A2 Recoil Buffer + A2 Recoil Spring 6061-T6 aluminum + steel spring Premium CNC machining