“The gravity of gun crime cannot be exaggerated. Guns kill and maim, terrorise and intimidate. That is why criminals want them: that is why they use them: and that is why they organise their importation and manufacture, supply and distribution. Sentencing courts must address the fact that too many lethal weapons are too readily available: too many are carried: too many are used, always with devastating effect on individual victims and with insidious corrosive impact on the wellbeing of the local community.”