Thanks for that. I recall shooting an Olympic Arms AR, 223 in the mid 80s. I was absolutely stunned by it’s accuracy.
I’ll check out the link you provided.
You might be astonished by some of the feats of accuracy that the AR’s able to do these days, then. Some of the “average” varmint-class ARs make the 80s era “National Match” guns look as accurate as an AK47 with a burned-out barrel.