Greetings! I just joined the forum, wish that I had found this a while ago as there seems to be a lot of knowledge here.
I am very familar with the 7.62, as I shot a M-14 in highpower matches many years ago. Also familar with the AR platform from 24 years in the military. I decided to put the two together and purchased a Sig 716 - the first AR platform that I've owned.