many topics come up
A year ago my friend's mom was working in a deli mart. There was a ruckus in the parking lot that had spread into the store. I was told that mom "ran to the back where the gun was kept and ran it up front to hand to the owner." So a) the gun was kept in the storage area (not good) and b) she had no idea how to use it (it was a semi-auto).
The fight simmered down and the disagreeing parties left, but what if it was a robbery or something? would she have been able to use the weapon? To retain it if lunged at? This brings up topics of revolver or semi, who's familiar with the weapon, is there a plan in place, etc.