If your looking for top of the line you will want to look at the Mars
series from ATN
. The Mars 4x
would work well on your AR and will be a low profile compared to most other NV riflescopes
. The model that will give you the furthest detection range will be their generation 4 model. This should give you a 250-300+ yard recognition range with decent ambient conditions. This is a good as you get for a dedicated NV scope for a rifle.