I agree with the above. Just use the larger diameter that comes standard no a carry handle and you will be fine. The smallest scoring area (5 point rectangle) is 2 inch x 4 inches. At 35 yards that's 5.7 x 11.4 MOA which is pretty big and we only shoot closer after the 35 yard stage.
I would suggest investing time at the range in figuring out your aim points at the various shooting distances (35, 30, 25, 20, 15 and 10 yds) to see where you have to hold to hit where you want. Or what you want to adjust your rear sight for to hit POA/POI. At least you have that option using a carry handle (I assume it's an A2 with elevation and windage adjustments?) unlike most BUIS.