This is an interchangeable style, AR front sight from HIVIZ. It includes four extra, fiber optic family LitePipes, in various colors, a carrying case, and a key to interchange the LitePipes. It fits AR and M4 rifles, with A-Frame or folding front sights. The sight is adjustable for elevation in 1/2 turn increments. FeaturesFits most A1 and A2 model riflesDoes not require gunsmith installationExceptional low light accuracyInterchangeable LitePipes to fit you shooting conditions and style