New materials cntinue to be developed for use as bullet-proof armor for vehicles, infrastructure and equipment.
Historically, antiballistic material designers have preferred tough but expensive aramids, high-density polyethylenes and the like, passing over conventional E-glass as too brittle to have ballistic stopping power.
Proprietary additives and resin systems have enabled the development of bullet-proof fiberglass materials. 3D weaving of carbon fiber, fiberglass or other composite materials can also help to develop high-strength preforms for use as armor materials or molded panels.
Source: Antiballistics: Better defense, less expense