Major Kong's post in FNAR 20std 308 rifle was marked as the answer
Short answers to your questions: no, kind of, no. The FNAR is based on the Browning BAR platform. It is nothing like an AR.
The good: It is sub MOA accurate and is a joy to shoot.
The bad: Magazines are expensive and you have to put a scope on it. It is not a light rifle (10-ish pounds with a loaded magazine and scope).