User blog comment:Kaido King of the Beasts/Why Does Doflamingo Carry a Gun? - And Other Stupid Questions/@comment-25032153-20141124041828

well he cant use his powers constantly plus it could be a left as he could have used it to kill his father and he used it to kill his brother so he would want to keep it as it is linked to his dead family though he is insane person that killed them.