To be a master armorsmith, you will need to reach level 500. But, before you got that number, you should conquer the level 300-400. Just like any other crafting profession, completing this levels are not that hard, but it can be boring as hell. You won’t fight or loot in the battlefield, but you should buy lots of stuff and craft more. if you are okay being bored for the long process, here is the brief guide for you.