Crossbows are quite special weapons. They are easy to handle and thus can used by every player regardless of class. Archer skills don't affect a crossbow either. Crossbows only use Iron Bolts and must be manually reloaded (crafting window) after each shot. On the other site they pack a neat damage with good accuracy over decent range.
You 1 Bow, 2 Iron, 2 Planks, 2 Strings and a Level 40 Archer