on the rock, i'm thinking about taking off the carry handle and probably just putting on a red dot sight of a holographic sight, change the hanguard to a pic/weaver style guard, maybe add a psitl grip and undermount a light.
for the new one, not sure of the sight yet. Thinking of the 24" barrle and undermount a launcher (even though i won't use that part, or rarley anyway lol). Not sure whether to go with the ar-10 or 15 set-up.