Tacfire AR-15 45 Degree Rapid Transition Back Up Sights - Black Aluminum SPECIFICATIONS BRAND: TACFIRE CA PROP 65: YES GUN SIGHT FRONT CONFIG: BLACK GUN SIGHT REAR CONFIG: BLACK GUN SIGHT TYPE: IRON SIGHT GUN SIGHT WEAPON FIT: AR-15 & COMPATIBLE MATERIAL: ALUMINUM DESCRIPTION Tacfire 45 degree iron sights are constructed of T6 6061 Black anodized aircraft grade aluminum for strength and durability. The front sight has an adjustable A2 post and the rear sight features dual apertures for use in short and long distance shooting. These sights would be a great choice if you would like to quickly transition from using optics to iron sights by just canting your rifle to a 45 degree.