You ever see a patrol car's trunk?
My soon to be Brother-in-Law's patrol car isn't so much a police car as it is a rolling general store.
Mini-14, Mossberg 500, big ole first aid kit, road flares, jack, those little signal triangle things, rain suit, etc. etc.
Our Sheriff's Dept. has carried Mini-14s since the mid-80s. Out here response times are in the 14 to 25 minute range, and there may only be one Deputy per sector per shift, so in affect the Deputy is his own back up.