Might be one of the first times that I've shot the 556-RC2 out doors. Have to say it sounds much nicer outside, but that is probably for all cans. Also running non trash ZSR ammo, and PMC XTAC M193 instead, and ejection seems much better post KAC repairs.
Side note: big fan of high angle grips for close/night focused guns like this. Running the DFCO grip on this one.