Based on the K2 which was introduced in 1984 and entered formal service for the South Korean military in 1987. Has a fixed front and fully adjustable rear sight. Has a birdcage flash suppressor and bayonet lug at the bottom of the front gas block/front sight assembly. Uses the AK-47 style gas system with an AR-15 derived bolt carrier and trigger group. Uses standard AR-15 magazines. Has a ribbed synthetic forearm, checkered pistol grip and smooth folding stock. With a green web sling. Magazine is absent.