The Remington 1100 is a fine semi auto.They're very reliable.If it's in good shape ,it would be a nice gun to get.I prefer a 12ga but there's nothing wrong with a good 20ga.I've had a 1100 in 12ga since 1973. Paid a whopping 159.00 for it with a plain barrel.You can buy several different barrels for the 1100's. Mine now has a vent rib.
Ruger Redhawk