@pissclams and other Call of Dutiers:
COD is resetting all progress on missions next Thursday. So, that means if you are still try to unlock that second insured weapon slot, you better bust ass on getting those Black Mous, White Lotus, and Legion tiers 1-3 missions complete.
HOWEVER, there are internet blogs saying that the next gen missions will be easier to unlock, but do we really KNOW that? No. No we do not.