Just a nice heads up saw the ultimate dlc is 40 bucks on steam, but when your in game it shows 10, since Steam forces you to play the game through origin you can just buy the dlc through origin and it will still work, I did so and have all the weapons but the challenge/story mode weapons.

Edit* You still need to unlock attachments but its not that bad imo

Make sure its the same origin account linked to steam or you just wasted money