ok if u wana get fire u have to place some lava. shoot an arrow trough the lava. then place a peace of waater on the block where u placed the first blck of lava and it will not give u an arrow but fire. fire can be used to make the chain armor its like crafting leather armor but use fire
I'm guessing this is not possible with vanilla survival with no mods. However the explanation is so horrible its difficult to tell exactly just what is being explained. And just what is 'Fire' that is being picked up or used or whatever and how do arrows come into play in this mess?
Sounds like a terrible bug or hack using mods of some sort.