If you're like me you must have spent all your WP rerolling a weapon and as a result have run dry. At least make the gunsmith able to sell them. It would make a lot of people's lives easier.
Edit 1: I don't have time to grind strikes, crucible, or patrol. To those of you saying just buy weapons and dismantle them, if you have actually done it then you should know how ineffective it is. 150 marks for 3 or 800 glimmer for 1. If you don't have glimmer or time than these are shit suggestions.
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you don't have time to grind any of those, than you my friend are screwed if you had glimmer and progressed far enough in trials to be able to purchase the weapon of the week which is legendary you buy as many as you have glimmer for then dismantle them. that is the quickest way to do it. I used my excess shards, sold them to the speaker, roughly a 100 = 25k which then turns into 100+ weapon parts, I say a 100+ for sometimes you'll get 2-4 parts per dismantle.