Rapido,
Is that a Millett DMS and an Aimpoint on your ARs? IF not, let us know what kind of optics they are, and how do you like each of them? I hear a lot about the Millett but don't know if I want one or not.
I was thinking about getting the 5.7×28mm upper but I just can't convince myself to have another caliber to buy. Might have to just because.