Sorry just reading through these posts and was shocked that people debate this. RAW shows PF gets supporting attacks. Step 1: roll to hit, supporting ranks get 1 attack. Completed. Step 2: Whenever a model with this special rule rolls a 6 to hit in close combat, it immediately makes another attack. Last I checked supporting ranks making to hit rolls count as close combat. There is no contradiction. No need to invoke AB > BRB. If you feel differently then AB does trump BRB anyways. But the fact is that they made 1 supporting attack as limited, rolled a 6, and "immediately makes another attack." Not gains another attack. Not gets one. Immediately makes one. Makes, creates, invents, pulls out of their tails, or finds it in a pile of dark clothes washed by bleach, I don't care. It's not a supporting attack anymore plain and simple.