So I may be a bit late to the party, but there is a secret camo for guns in Black Ops 2. More specifically, a Diamond Camo.
To get the camouflage, you need to get Gold on all the guns in that specific category of class. For example, all assault rifles gold unlock you diamond for assault rifles.
Now, the reason I brought it up is because I was thinking it was a good gimmick to use in a BO2 series like my MW3 series where I passed death's K/D in TDM. Just a thought.
Has anyone see the diamond camo or unlocked it already?
This may not even be true lol. I guess there's one way to find out.