Playing Runes of Magic, when your character reaches level 10 you will be able to apply for you first class. There are two kinds of class in this game and here are also description of them, please have a look.
Later, they are allowed to transition into Sharpshooters, and then they use bows and learn bow related skills(runes of magic gold). While what unfortunately, Sharpshooters the early are not allowed to use bow techniques with a gun equipped, so they use guns. Players wishing to use guns as Sharpshooter would be wise to aviod leveling up their bow skills too much since they are later not used. Bow Sharpshooters are a different story.
Swordsman are the intermediate class for both Crusaders and Champions. They use swords and the possibility to equip shields as well. Players are advised to learn only the necessary skills as swordsman. The skills they learn later as Crusaders and Champions are FAR more important. Poor skill placement as swordsman can hamper their advancement in the seconary class.
