A configuration (600), all components of which are man portable, for holding inexpensive composite panels (100) that protect assets against external force and impacts from airborne projectiles. An open box-like stackable frame module (1400) holds thin panels (100) along a longitudinal axis of the frame (1300). Multiple frames (1400) are connected to construct a protective barrier, such as a wall (1500). The panels (100) may be formulated of a very high strength portland cement-based concrete with one side, both sides, or both sides and all edges, covered with elastic material, the combination of which significantly reduces penetration of projectiles. A panel (100) may be covered with specially formulated elastic material (103) comprising multiple layers, each layer of a different type or thickness of elastic material (103). The elastic material (103) may include reinforcing material such as fabric woven from available COTS high-strength fibers. The panels (100) may be fabricated using basic means available in rural locations. A method of installing is also provided.