Not sure about Atlanta, the truth is I don't know if you'll have much luck. From my limited experience there's usually not a whole lot of carry gun types for rent. It follows a trend here from range to range there seems to be always about 10 types to choose from, the list usually goes like this.
XDM (various versions)
Sig 226
Glock 19
Glock 26
M&P (various versions)
usually one revolver of some type
Unfortunately from what I've found that's about as extensive as the list usually gets.