Full auto not applicable when the attack is an Entire Order Skill So Suppressive fire is Entire Order skill to enter Suppressive fire state but Aro (bs attack with Suppressive fire state can get full auto lv2 effect?
Suppresive Fire is a Long Order in the active turn, but the BS attack is an ARO during reactive turn, so the "long order" part is not important here. http://infinitythewiki.com/en/Full_Auto Lv1 requires Active Turn, so it won't work on Sup Fire. Lv2 only requires shooting, so yes it can.
