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Riot shields are lightweight protection devices deployed by police and some military organizations. Riot shields are almost exclusively long enough to cover an average-sized man from the top of the head to the knees. Some riot shields are designed to be bullet resistant against low-velocity handgun and shotgunammunition; however, most are not. They are generally intended to be used in riot control, to protect the user from shrapnel, thrown projectiles, and splash from various weapons such as a Molotov cocktail. They can also be used as short-ranged melee weapons to push back rioters.
Besides being used primarily by the Military and Law Enforcement People, any NPC seem to react to it.
Like the shield, this object will not actually protect you against projectiles or melee attacks.