HK VP9SK SLIDE KIT OPTIC READY WITH ELEVATED SIGHT. 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. 6.5 Slide Overall Length 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. It does not include: -Barrel -Recoil Spring. Track Page Views With.