I watched this Discovery channel show about the US Secret Service and they show the latest in "bulletproof" body armor. They test-fired all sorts of light caliber ammo and it passed pretty much all the tests. What I don't get is, they tested it against 5.56mm NATO rounds (which penetrated after multiple shots). The problem is that our enemies mostly use 7.62mm rounds (like in the AK).

When I worked overseas, we had "up-armored" vehicles that had 1/4 inch composite armor plating that was rated to stop a 5.56mm NATO round. This was in the Middle East where our enemies mostly use 7.62mm rounds in their AKs. Are armoring companies so shitty that they don't even rate their equipment's' effectiveness against the most common ammo that our enemies use?