OK I know this is an old post, and the contest is over, but I posted about a 1/2 MOA AR15, so today I shot mine trying to get there, didn't quite get the groups I wanted. Shot 10 50gr Nosler BT and 10 60 VMax.
50 gr was about 1.040
60 gr was 1.210
Avg is 1.125"
Larue Upper
Going to try again with some 75's or 77gr bullets, I know this doesn't count, just shooting for fun. Will try clean targets without tape on the next round.