 Official plans include reduction of the vehicle to 20 tons to enable airlift capabilities as well as a better integrated and improved interior for the crew.Advancements in firepower, mobility, and on-board technology are still yet to be confirmed.Hanwha Defense have proposed a development of the K21 known as the AS21 Redback equipped with a 40mm caliber automatic cannon for the Australian Army's LAND 400 Phase 3 IFV competition.