I have a friend who is a retired Navy guy and is 73 years old. He is amazed with my precision rifle and the idea of long range shooting. Right now we have access to 200 yards at the local range but can travel to 1,000 and everything in between. My friend has a AR-15 that we put a new upper on with a 24" stainless bull barrel with 1-8 twist. We mounted a bipod and upgraded the trigger and stock to the Magpul PRS. He wants a higher magnification scope and a one piece mount but I'm not familiar with this platform. He likes the idea of a lot of power to help his old eyes and I've been leaning towards the Bushnell Elite 6500 4.5-30 because it's a smaller body scope with a huge magnification range. Any other suggestions? How about mounts? I was thinking Nightforce unimount extra high? Any suggestions would be appreciated. We are planning on going to at least 600 yards and he likes the idea of more power than my NF 5.5-22X50 at even 200. Thanks.