One of the biggest and most powerful mobile armor developed by the Principality of Zeon during the One Year War, the prototype MA-08 Big Zam saw combat during the Battle of Solomon on 24 December, UC 0079. Deployed in an act of desparation to hold off the Earth Federal Forces' advance on the asteroid base, Rear Admiral Dozle Zabi personally commanded this giant mobile armor into battle, destroying over 20 enemy mobile suits and 9 capital ships. The Big Zam's primary armament was its extremely powerful mega particle cannon, capable of wiping out several targets - and even entire battleships - in a single shot. It also mounted 28 anti-aircraft beam guns around the circumference of its main body, providing 360 degrees of protection. In addition to a pair of large-caliber vulcan guns and claw missiles in its toes for close defense, the Big Zam was also the first mobile weapon to be equipped with I-field barrier generators. These generators, a byproduct of Minovsky particle physics, created a screen of protection around the Big Zam that was impervious to all beam weapons fire.