The PK Drone Mk II added a few refinements such as a faster response time. Lighter materials without sacrificing durability. More interesting is the MK II's ability to transform into a fast flight mode allowing it to cover vast areas of the battle field in little time. However this new Drone lacks most of the free thinking Software the previous version had. It was removed mostly for cost and the older drones tended to become "Unstable" after a while. The new MK IIs have surpassed the older MK Is and even surpassed manned Mechs in most areas.