The VP9SK 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. Specifications for Heckler & Koch VP9SK Optics Ready Slide Conversion Kit. Heckler & Koch VP9 SK. Heckler and Koch VP9 Optics Ready. Features of Heckler & Koch VP9SK Optics Ready Slide Conversion Kit. Complete firing pin assembly. Cover plate for optics cut. 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. Heckler & Koch VP9SK Optics Ready Slide Conversion Kit.