it was said that "Ferro-Fibrous armor was lost to the Inner Sphere during the Succession Wars. The Draconis Combine was the first to re-create it in 3040." (http://www.sarna.net...i/Ferro-Fibrous)
so what kind or armor plating the mechs used before 3040? Endo steel is used for skeletal structure of mechs AFAIK.
Edited by Dataman, 17 June 2012 - 06:33 AM.