(adsbygoogle = window.adsbygoogle || []).push({}); As most of us know, when you get all perks, you also get all proficiencies, but in a case where I pick up a gun after I receive specialist bonus, do I get all proficiencies? Also, what if I have over kill-do both guns get all proficiencies?

Pretty sure you do on overkill. After you pick up a gun I am not sure but I would say not.