Originally Posted by ErikT
You should have one semi, one mechanical semi, one good pump gun like an open class gun of some kind, and one stock class gun.
I tend to go along with this principle myself. Of course I'm a bit of a gun hoarder, so one electro, one mech, and a pump is just the bare minimum I'll take to the field. Often you'll find everything from mechanical full autos (at the occasional field that lets me use them, never against the new players of course), to semi auto pistols, to sling shots in my gear bag, and everything in between. I think my record last year was 7 guns used in one day.