Sydney is not exactly awash with handguns, so one has to ask the question, where does a pair of teenage robbers obtain a pistol and rifle? I doubt they acquired them on the spur of the moment before robbing the pub in question - getting your mitts on a gatt requires a large amount of premeditation. And money - these things aren't cheap.
So where did the pistol come from, and the cash to pay for it?
How did they intend to get away? On pushbikes, or in a stolen car?
Once you start adding up all the bad, bad things that this duo had to do in order to get to the point where the police ventilated one of them, you really have to wonder how the mother of ex-desperado Number One could describe him as a "good boy". They must be handing out packets of delusion with the dole cheques.