In conjunction with the development of the T48 project there was some discussion regarding armor. The weight of conventional armored steel needed to provide protection against the emerging large-calibered high-velocity main guns and improved APDS kinetic energy penetrators was making its continued use impractical. Composite applique armor panels made with fused silica glass was envisioned to be fitted to the hull. It was also desired that a turret be constructed using this special armor. The OTAC and Carnegie Institute of Technology began development of the armor in November 1952 at Fort Belvoir VA as Project TT2-782/51. This composite armor provides protection against HEAT, HEP, and HE rounds. Its overall slow development limited its use to the T48 and was dropped from consideration in the M48 by 1953, however its development was continued with the T95 Medium Tank until 1958.