HIVIZ sights are machined from solid steel and feature fiber optic LitePipe inserts for increased visibility and faster sight acquisition in all conditions. Includes interchangeable lite pipes. FeaturesLITEWAVE interchangeable LitePipe designIncludes green, red and white LitepipesAll steel constructionLitePipe diameter 0.070"Windage and elevation click adjustment DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.