KAC-Knight's Armament 200-600 Meter Flip-Up Rear SightKnight's Armament
Mounts to flat top upper. Flip-up sight stays down out of the way when using optics, yet is easily flipped up. Windage and elevation adjustable.
Older, classic style. A cloner's must have for the MK12 build. Essentially does the same job as KAC 25650 with a bigger base and knob. Great for when you're keeping it old school.