A modular ballistic wall system uses a military standard shipping pallet as a floor. A wall frame is rotatably affixed to the pallet. The wall frame receives and supports a plurality of modular ballistic wall panels. The wall frame folds down against the pallet when the system is in a stowed position, e.g., during transport. The wall frame is generally perpendicular to the pallet when the system is in a deployed position. The modular ballistic wall panels can be solid metal ballistic panels, ballistic panels with firing ports, or ballistic glass.