After too many years I finally 'pulled the trigger' as this model has the specs I have been waiting for: 1. 1:8 rifling, 2. Full-floating 16" barrel, and 3. full-length gas impingement. Now to flesh it out.

I am 83 and dealing with AMD, mostly in my left (master) eye, and training to aim & shoot right-handed. I'm leaning toward a red/green dot. Any recommendations?
Many thanks, Rich