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.