User blog comment:PFC Arkalis/Battlefield 3 Unlocks and Rewards; New Battleblog/@comment-68.57.114.216-20110808181519/@comment-1647479-20110812224110

One 5.56 round to a plate of ceramic body armor would halt the round, crack the armor and bruise the wearer. A few shots would compromise the armor and enter (and likely exit) the soldier. Now under what conditions would he die? IRL, utterly random. In-game, a couple shots. So about 5.