Does IO make Ar15's?
IO don't make AKs why would they make ARs. LOL
To the OP it depends on your budget. You'd do fine getting a Ruger or S&W budget AR. The Sporter models are probably lacking a forward assist, have different profile barrels, just minor things that a general shooter that doesnt shoot alot won't notice. They likely aren't staking castle nuts and gas keys. Next level guns like Colt and BCM are going to be total mil-spec, properly staked parts and have better resale value.