I'm looking for a scope to top my AR. Since this is a predator hunting rifle mainly used in low light conditions at dawn and dusk I want a scope that fits those conditions. I've been thinking of buying a scope with a 50mm objective but have read the larger objective doesn't help nearly as much as the quality of glass and lens coating. Also I read a scope with a 40mm objective at 3 power will be as bright as a 50mm objective scope at 4x considering the optics are of the same quality.
I'm pleased with the 3-9x40 Burris FF2 on my current 223 and the 2-7x35mm Burris FF2 on my wifes 308. So I'm considering the Burris FF2 3.5-10x50mm. I also have the RRA 1" high rise one piece mount on the way.
Any other recommendations for a low light scope would be appreciated.