The big silver thing which is an iron cross with a reef and a bulls eye is a us army expert marksmanship badge. I can't see the tag in the photo, it would tell you what he scored "expert" in, probably RIFLE. Minimal passing is Marksman (iron cross only), followed by Sharpshooter iron cross with...
The big issue with rocksalt is you have to be very close for the salt to penetrate clothing and stick to be effective. Get some of those 12GA hard rubberballs. :) just be sure you have a backup plan incase of return fire. Rubberballs vs 9mm isn't good odds.