Originally Posted by
Default.mp3
Caveat to everything I'm about to write is that I'm just a gear queer with no actual duty use of armor.
AFAIK, the only real thing to make sure is that it covers the heart, the major blood vessels above it, and the lungs. I'm 5'8", ~145 lb, and personally just run size SAPI small; smaller plates allow better range of motion, as it is, and is less weight, and might allow you to more easily mount your rifle. Getting the plates high enough is more important than long enough, I believe. My plates start from my clavicle and go to the bottom rib, basically.