Colt AR15A4 Rifle -Designed with the Law Enforcement patrol officer in mind, the AR6720 is a lighter platform that does not compromise durability. The AR6720 comes standard with an optics ready rail and a MaTech flip-up rear iron sight. The MaTech flip-up sight has adjustment for both windage and elevation. Its slender design lets the operator use their peripheral vision to maximun advantage. The US Military has adopted the MaTech flip up rear sight and has been using it for almost a decade. Flat Top Upper Receiver with Detachable Carry Handle Chrome Lined Barrel Ambidextrous Safety Selector Manganese Phosphate Barrel Finish A2 Fixed Front Sight