You must be joking they the criminals and or terrorists will just buy and attain firearms another way they won't be legal because they have no respect for the law that is why they are called criminals. Just remember that the US military left 350,000 full auto s in afghanistan which has now become a global underground leader illegal firearms. We had a nutter that killed 6 people and injured 18 others single handed at Bondi junction with a knife I could say if there were 2 of them that figure would double. Yet 2 gunmen only managed to kill 15 people , Martin Briant by himself managed I believe around 35 if there were 2 of him that would have been 70. The probability and stats just don't add up.