The STR-9 Optics Ready features four interchangeable plates for attaching some of the most popular aftermarket red-dot sights to the top of the slide. These sights provide fast and accurate target acquisition in a wide range of lighting conditions and also allow shooters to focus on the target instead of their iron sights. The STR-9 Optics Ready comes with three interchangeable backstraps, three magazines, fiber-optic front iron sight, loader and four optic-mounting plates.