The Grunts are the basic line Infantry of the USARF. Whereas most factions have ARM 1 Light Infantry as their core troops, the USARF has these ARM 3 Medium Infantry as theirs, for only 10 points. So good!
BTK is an homage to Full Metal Jacket's "Born To Kill" (which is too much to write on such a tiny head!).
To add a little subtle variety to all of the Green throughout the army, I glazed different portions with different colors to tint them. "Hard" parts like armor and helmet were glazed with VMC Brown Violet 093. Pouches and packs were glazed with P3 Battlefield Brown.