The VP9 SK Optics ready slide quickly and easily converts a standard VP9SK OR VP9SK-B to an optics ready platform. Just install your existing barrel and recoil spring. VP9SK Optics ready slide includes: Cocking supports Complete firing pin assembly Cover plate for optics cut Suppressor height sights. Black serrated rear and high contrast front sight. The Suppressor Height sights are specific for lower 1/3 co-witness with a mounted RMR. Other sights may vary.