My choices for that use:
SWFA 3-15X42 SS
SWFA 3-9X42 SS
Vortex PST 2.5-10X32 PST
Weaver 3-15X50 Mil/Mil
In a quality non-QD mount.
If you aren't using the rifle for home defense, 3-gun or close quarters combat of any type, there's no reason to think you need a 1-4 or similar just because the rifle happens to be an AR.
