The VP9L 2020 slide quickly and easily converts a standard VP9 OR VP9-B to a VP9L optics ready platform. Just install your existing barrel and recoil spring. - VP9L 2020 Slide includes: - Cocking supports - Complete firing pin assembly - Cover plate for optics cut - Suppressor height sights. . - The Suppressor Height sights are specific for lower 1/3 co-witness with a mounted RMR.