There was general looting happening in the larger cities once regular deliveries of food and stuff was disrupted. The National Guard were deployed as riot control and security. That mission requires weapons and so the issue of M4s. Ammo issued is not the standard combat load, only 120 rounds in four magazines. MPs are issued the SAPI mentioned above, but it was not required for this mission. Real body armor, ie level III bullet proof worn by law enforcement, is not issued by MP companies. The threat of getting shot at while enforcing Army regs on a closed military post is, despite recent domestic terrorist incidents, almost non-existent.