We need a ruling by FFG on that one.
Outmaneuver: While you perform a forward firing arc attack, if you are not in the defender's firing arc, the defender rolls 1 fewer defense die.
RZ-2 Awings have no forward firing arcs, so they can never use Outmaneuver. All they have are turret arcs that can face forward or backward. But that doesn't count. [Why not?]
This means either the Quickbuild card needs adjustment, or the rules need adjustment.