So young humanoid built The White Tortoise as an Exo-Force vehicle for the human forces. Young humanoid soon decided that he would built an equivalent for the robot forces. Since The White Tortoise used two smart bricks and one minibot, Mission Accomplishing Unit [Class B] (MAC [Class B]) used two smart bricks and a minibot as well. It featured a rotating turret that fired rubber bands, a capable tread propulsion system, a front missile, and a minibot deployment mechanism. The minibot, riding on LEGO tracks, also featured lights.
Thanks to LEGO's discontinued theme Exo-Force and rammjet's project Armadillo for the inspiration.