I liked this game almost immediately (despite the occasional complainer, if there's an easy way of putting them on ignore in the middle of combat please let me know haha), and I decided to get some of the DLC's from Steam. I got some weapons, I guess considered among the best in the game from what I've read. So as I ask in the title, is there a benefit to unlocking weapon parts on weapons I probably won't use? Or should I just forget them and just use the (hopefully) top-tier weapons and concentrate on learning how to use them? On a related note, is there a way to sell any of the guns?