The groups are pretty erratic. I have shot it off a bench with a grip-pod and a rear sight that I guess is a backup sight for the military. I have also used a Burris AR-332 3x prism sight with results that are not much better. I worked up my loads from 22.7gr IMR4895 with no real change in accuracy. I may need to try a better rear sight since the one I have seems a bit cheap and as the name implies a "backup" sight. It does have a flash suppressor that came with the upper. I have looked at it to see any bullet strikes, and there is no apparent problem there. It is the standard M4 type. I think it is removable, I just don't know much about the AR platform or how to tell if it is removable. My front sight isn't adjusted too far out. It is flush with the sight base. I torqued my rear sight to the flat-top to 20in lbs. I do hit what I aim at though. I was always told that AR's are inherently more accurate than say an M1A or Garand. And since Ar's are taking over service rifle, maybe that is true. I'm just not seeing it. Thanks for all the replies.