Sounds like you're only planning on using it for pretty short range -- i.e. under 300 yards (which is where that rifle is most ballistically effective anyway). Unmagnified optics like the Aimpoint and EOTech will not hold you back at all at those ranges. Neither will the factory iron sights. The trajectory for that rifle is such that when you're zeroed at 25m you're also zeroed at 300m, so you can aim dead on at a man-sized target anywhere from point blank out to 350m or so and get a hit somewhere on it (that's the concept of battle sight zero). I would definitely prefer the 2 MOA dot version of the Aimpoint over the 4 MOA version for the reason that was mentioned -- a 4-MOA dot is as big as a human head-sized target at 250m, and it is tough to place a round accurately when you're trying to block out the whole target with your dot! If you want to do anything other than close quarters with it, I'd go with the 2 MOA dot.
If you want a telescopic sight, I'd stick with the lower powered ones for those kind of ranges. Don't get anything you can't adjust down to at least 4x.
If you want a telescopic sight, I'd stick with the lower powered ones for those kind of ranges. Don't get anything you can't adjust down to at least 4x.
