Thanks, I did not mean to side-track the other thread.
I am currently running an M4S. I run it because: I tried almost all of the 1.5 through 4X ACOG's and they just flat out sucked up close unless using BAC, which for me sometimes had a POI shift of up to a foot across a room with the covered objective method. Very poor compared to an RDS.
Now I run an RDS, but hitting things PRECISELY at 100+ yards is not as easy as with an optic. I would go so far as to say I can shoot tighter groups using A2 iron sights than I can an RDS. My best group using M855 using irons was 2.25" at 100 yards for 5 shots from a .gov profile A2 barrel. So far the best I managed with an ACOG TA44SG-10 was around 6" or so. Of course, I tried a lot more for that 2.25" group. Shot a lot more that day. I was hitting the white M855 Winchester boxes 3/4 times, though, at 100+ yards using A2's. It was slower than an RDS, but I think more accurate.
Anyway, long story short, my rifle will be used for hunting, plinking, and punching paper more than it will be for shooting angry UN storm-troopers storming the country to enslave me (I hope...), so, with that in mind, I would like an optic that gives me the intermediate range/fun/capability to ID a target (Neighbor's dog...or lone coyote?) without sacrificing any more than I have to for CQB type work, if I ever need to use it as such.