No, _Symmetry_ is the best auto rifle for PvP. ;P
I should know, I just went Sweet Business versus Symmetry just now in Crucible and it wasn't even a contest: I could kill everyone except the person using Symmetry, where going toe to toe versus a scout at mid-close range was an exercise in futility, because no matter how many shots I fired, I couldn't land them because of the flinch from Symmetry, while they were getting precious little flinch.
I swapped to Symmetry right after that, and wrecked some people before match timer ran out. :P
And I was running Actium War Rig with Hazard of the Cast and Valakadyn at the beginning of the match too. :P
Unfortunately, with Arbalest in every match, it's become a matter of which team can bunch up together while ADSed and make it a distance game down laneways, which makes using ARs in Crucible a lot less fun to use.