I want to ask since its ending and i wanna see if its better to bet for maybe a better one or just to buy this one, i really like the vandal skin but i dont know

Hey everyone, just wanted to ask a quick question about rank gunbuddies; just got promoted to gold 1 in act 2, previous act i was silver 3 (max). 1st question: when are the rank gun buddies given out? 2nd question: if i drop down now back...