Originally Posted by Mackay_Sagebrush
A 3.5x15 SWFA would fit the bill perfectly for an AR shooting out to 600 yards.

Good quality glass and the optic itself is not overly large.

An example on a 16" gun:

[Linked Image from i.imgur.com]

As would a 4.5-14x42. I was just shooting at 600 the other day with a 4.5-14x42 Burris AR specific scope on an AR on a 10" plate. Hitting it with no issues at all. That's the minimum power I'd want. Using my 5-20x56 Nightforce makes it easier and then the 7-35x56 ATACR, even that much better. But if we are talking absolute minimum power, for my eyes 14x is it. YMMV. I for damn sure wouldn't be using a 1-8 power.
[Linked Image from i.imgur.com]

Originally Posted by raybass
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style.
Originally Posted by Pharmseller
You want to see an animal drop right now? Shoot him in the ear hole.

BSA MAGA