Some General Questions- please help.

First, is anyone aware of a guide for all the new weapons and their benefits/weakness. possibly also a guide explaining all the symbols , I know some have to do with range, air burst, etc. but not sure if these are supposed to indicate bonuses or just ideal uses.

Second, What is the white number/numbers in the upper right corner of the main menu? I thought maybe it was population count but it has never changed.

Finally, i did a limited search, but… When do you get the Warzone premium packs. Everything says you get 2 per week. My specific query is, do they get released on a specific day, like every Monday, or is it one week from the day you purchase?

Thanks for any help.