Hump really not ugly. I am sure it there for strength & allow cylinder enough room to swing out. (The cylinder swings to the right because hand or pawl is on the left so it has to go right. That is direction all the cylinders in NAA guns come out on.)
LOL makes me think of the song "My Humps" by Black Eyed Peas
http://www.youtube.com/watch?v=SxHdVZ1nNCY
