I own a store in a strip mall, type shopping center. the walls are sheetrocked and my register is deep into the store, away frome large store front windows. My question is this, knowing a BG threatens with a weapon of some kind, there is really no place that gives me a good tactical advantage and 1 of 2 decent back stops. In order to have either one, it would put me out in the open. What would you do, keep cover and fire w/o a back drop, or expose yourself and hope you dont get killed trying to take the threat down with a back stop?