Gunsmith should sell nothing but blue weapons once you reach level 20. If you're a level 28 there is no reason I would want a green weapon. I may however, need a blue weapon. In two weeks of constant play I have seen exactly one blue fusion rifle drop. I know this game is always trying to pad out content, but changing the drop rates to less than one percent on the thing I need simply because I have the bounty is beyond infuriating. And the gunsmith has sold every other blue weapon twice every time I check but refuses to sell blue fusion rifles. Seriously, Bungie? This game... I'm gonna go play Advanced Warfare because they don't try to make their game infuriating and don't actively hate their playerbase.