New player trying to understand some things.

[Mousikos]

1) There is a nice little section on weapon statistics here: https://assault.cubers.net/docs/introduction.html
2) No idea what this means
3) Barely, but yes. View the next branch: https://github.com/assaultcube/AC/issues
4) Can't help that. AC has trouble rendering log distances. Usually I change the video settings from the menus to horrible.