8, 10, 12, 20, got just about every one of em, my uncle found a 10 guage over and under in the old farm house attic last fall, sold it to cabelas for 8500
you are forgetting 16 24 28<-extremely rare and 410... its odd they way they figure out what gauge the gun is... read up on it. its well worth the 5 min of searching
lol i have a 10ga reloader id like to try and sell
really dont want to put it on ebay
i can upload a pic if anyone wants to see it
(i should say if i can find any interest)
if not oh well