I just switched to a single pin from a 3 pin. With my worsening eyesight, I am able to focus on the single pin better. I also have put red dots on most all of my rifles that previously had iron sights, just can't see them anymore. That is to say I would if I owned any rifles.
We live in the land of the free because it is the home of the brave. THANKS to all our military and LEO for the job you do.