I went to the Rural King in Clarksville, TN. The gun section was a depression in the back wall of the store, probably in the neighborhood of 20 to 25 feet deep, but four aisles wide (though they were narrow aisles), with the display case across most of the back wall.
The larger gun accessories (safes, racks, etc) were out in the main part of the store, in the ‘sporting goods’ (fishing, trapping, etc) area that you walked through to get to the depression in the back wall. The aisles in the depression leading back to the gun display case were for magazines, targets, ammo, holsters, a few air rifles, and archery items.
That depression was a small area, but I’ve been in a few gun stores in the Nashville area, that weren’t any larger, though some of those had a better selection of guns than Rural King (less of a selection of magazines, holsters, etc).
The distance from Nashville, and the gun selection being smaller than many Nashville gun stores, probably keeps the number of Nashville shoppers to a minimum, at that store. That’s not a bad thing, in my opinion. The fact that they did have multiple guns that I was interested in (I already know where part of my tax return will probably be spent), and a brand or two that some of the Nashville stores don’t seem interested in stocking, mixed with being able to wander around in the rest of the large store, makes it worth the trip, for me.
Edit: Before walking into the store, my expectation was that it was something similar to a Tractor Supply (TSC) store, but with a gun counter. That turned out to be off, by quite a bit.