We were without power for over a week after Hurricane Andrew. There was some looting, and there were stories of people patrolling their land with firearms. I have several firearms for different uses in these categories:
Concealable handguns
Larger self defense handguns
.22 rifle for small game
9mm carbine rifle for up to 50 yards defense
Hunting rifles
12 gauge shotgun

The 9mm carbine is my in-betweener which is more accurate than a handgun and less likely than a rifle to kill an innocent person a mile away. I consider the 9mm carbine to be a good urban defensive firearm for light patrol duty but close around the house and especially at night I would just grab the shotgun.

Best regards, Keys