This detachable carry handle with A2 design is made with Aircraft grade aluminum and steel for strength and durability. It comes equipped with a built-in dual aperture rear flip-up sight with adjustable windage and elevation settings. This carry handle is 5 inches and its overall base is 7.125 inches long. Fits on rifles with a flat top and will act as both carry handle and rear sight system. Dramatically improves sight pictures and enhances shooting accuracy. Exact precision, tolerances to fit all model 4/15 variants. No gunsmithing is required.