That would be a big issue for me. The A2 stock is too long for me. I have rather short arms, and while it is not a major bother using an Eotech or Aimpoint, I can't get anywhere near the charging handle without getting into a rather odd position. I am not sure even an A1 stock would get me close enough. Ideally I guess a 6 position retractable would help out, but that seems only a longshot when the dust settles next year.
A good 3-9 variable would be the best for what I really want to do with this rifle. I just wanted a more "military" look with lots of cool factor, of which an ACOG has a plenty.
I still may go for an ELCAN if I get too impatient saving up for a TA11. It seems like a neat scope that would suit my rifle well. I am aware of the Elcan's limitations compared to the ACOG, but I do not consider them too great to rule it out. The only thing that bothers me is the reticle. I just have a hard time using a post. Donuts I can live with, but at heart I am a crosshair kind of dude, hence my original desire for a TA01B.
In the end, no matter what rides on top of my AR-10, I got one big grin on my face every time I pull the trigger. This is one bad boy that looks mighty nice sitting next to its little brother in the safe.