Ok how to set up an ar for competition?

[Rambozo]

F class I would offer a different caliber choice than the standard .308 which is the .260 Rem but not shooting that discipline I only base that on the ballistic tables.

While I didn't specify, the recommendation was geared towards F-TR. Someone getting started out, would likely be better served in that class. There is a much more distinct and lower equipment ceiling, and so it doesn't put you in a class trying to play catch up to hotrod equipment and belly benchresters.