Every year, Call of Duty has a mastery camo grind for players to chase in Multiplayer, and there happens to be four different grinds in Modern Warfare 3. I have the full list of camos that you can expect for the completionist grind when MW3 goes live.
All Mastery Camos in MW3 Listed
There are four Mastery Camo grinds in Modern Warfare 3 that are divided between weapons and modes. Both MW2 and MW3 weapons will have a Multiplayer and a Zombies set of challenges. In total, that leads to 16 different camos to unlock across the board that are under the completionist umbrella.