Most people are looking for the maximum protection for a rifle round and completely ignore the weight issues of the plate. Buying a light weight plate makes all the sense when you think about running from an attack. Most people don't even think about this. They typically only look at maximum protection even though after one hit, they will be on the ground. These plates have become very popular simply because they are effective against a .556 round which is the most available round in the U.S. Who wants to die, because their plates were too heavy?
Looking for protection from a rifle shot, in conjunction with your 3A vest? These PE ICW plates are designed for a single hit by a .308 or multiple .556 rifle rounds.
These new Level III Plus plates only weigh 2.9 pounds and will give you much better agility when in a fight.