Abstract: A containment device is formed by an outer container having a curtain-covered front opening and separate removable and replaceable protective panels mounted within the container adjacent to each of the walls thereof. Each protective panel is formed of a composite of layers, including an outer energy absorbing layer closest to the container walls, an intermediate ballistic shield layer, and an inner elastomeric layer. A firearm to be inspected, loaded or unloaded is positioned with its muzzle pointing toward the curtain at the front opening of the device whereby, if the firearm accidentally discharges, the projectile will pass through the curtain, the inner elastomeric layer, and become entrapped and contained within or adjacent to the ballistic shield layer. The outer energy absorbing layer prevents damage to the wall of the container. If one of the protective panels becomes damaged or deformed, it can be individually replaced.