I've had an AL 48 in 20 guage since the mid 70's. Mine has a 26 in vent rib with IC choke. I absolutely adore this gun for bird shooting and close rabbit hunting. It is very light to carry and swings like an extension of my body.
I just started looking for a 2nd barrel for it in either modified or full choke or perhaps one with screw in tubes if they aren't too expensive.
Buy it, shoot it, and you'll fall in love with it.