I was looking at a couple of Benelli M1 Super 90s and noticed that some were labeled Magnum and some 2 3/4 - 3. Well the Magnum still shoot 2 3/4s okay? One had a post like thing to cock the bolt and the other had more of a larger tab instead. Is this just an option or is one older then the other. Any place where I can read about the changes in the models over the years?
Ghost sights or iron? Any pros or cons?