Not done yet, and the spec on it isnt finished either. But heres the level 60 ammo bag from Blizzards Artcraft post.
http://us.battle.net/wow/en/blog/14176224/artcraft-concept-class-accessories-5-20-2014
http://us.battle.net/wow/en/blog/14176224/artcraft-concept-class-accessories-5-20-2014