Before launch I always saw people playing with yellow DMRs and camo LRs etc at events. But now that the game is out the only thing I see in MM is the preorder artic BR.
How do you unlock weapon skins?
Most weapon skins are unlocked from leveling up Specializations.
In order to start leveling those up, you need to reach SR50 rank, which is basically impossible with the current daily XP cap. That’s why you don’t see the skins yet.