 Space is also provided for sets of engineer equipment, for mounting of commander's and gunner's cupola and associated equipment.Space needed to accommodate personnel and sets of special equipment was obtained by removing tank turret, cutting away section of hull roof plate and by refitting of superstructure consisting of armour plates and sheet metal that provides adequate ballistic protection of on-board crew and equipment.Armour plates are up to 25 mm thick and mounted so as to provide ballistic protection from 12.7 mm (.5in) bullets.