Let me try to get to think about mounting the ACOG to the carry handle, the way it was designed. A number of us here have done so and like it very much. Others find it's a tad too high and doesn't allow them the cheek weld they prefer. Here are, IMO, the advantages to going with the carry handle method first:
1) It costs you
nothing to try it!
2) All of the reticle compensations are designed for carry handle mounts, so the accuracy of the optic is as good as it gets in this mode.
3) With this mount your BUIS (Back-up Iron Sights) are immediately available at all times merely by looking beneath the ACOG - no expensive flip-ups!
4) If you decide you don't like this, you aren't out a penny!!
I mounted my TA31 to my A3 Bushie's CH and it's been a dream, both with an A2 stock and now with its ACE skeletonized stock, and its speed in close and accuracy down range have been everything I've wanted.
Give it try!