What doesn't is that the game still insists on locking off
weapon attachments until you've earned a certain amount of kills with said weapon, a really pointless decision that just means the shiny new gun you spent cash on feels far less useful than other items in your armory for a little while.
Not exact matches
Weapons and certain
attachments / upgrades are locked
until you reach a certain level, but new
weapons come a little bit too slowly, especially since it takes just a few games to get enough unlock tokens to completely kit out your starting
weapons with whatever you want, by which point you'll probably really be wishing you had a new gun to play with.
One thing I've found is that a lot of people skip over the Challenge mode
until they find out that is where some of the
weapon attachments unlock.