T-55A Main battle tank

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The T-55A MBT was primarily developed to incorporate a new antiradiation lining and full PAZ/FVU chemical filtration systemThe T-55A MBT was primarily developed to incorporate a new antiradiation lining and full PAZ/FVU chemical filtration system. One of the major internal additions were the use of a plasticized lead sheeting for antiradiation protection. This was evident externally due to use of an enlarged driver's hatch and enlarged combings over the commander's and loader's hatch to accommodate the new material. Since 1970, T-55A tanks began to receive a new turret fitting for the 12.7mm DShK antiaircraft machine gun.