In general, most mastery camos are the same across weapon archetypes. For example, the Gold camo challenge for all launches is to defeat two enemies without dying five times. The challenge values themselves might vary from weapon to weapon—for example, the JOKR requires more multikills for its Gold camo than the other launchers—but the challenge itself remains the same.
Before we list off the challenges, it’s important to note that mastery camos are unlocked in sequential order. The progression looks something like this:
In other words, you can’t earn Orion without earning all the other mastery camos first. Since more than 51 weapons exist in MW3, it’s possible to skip a few weapons and still obtain Orion camo. As of Season One, you can skip the camo grind on four weapons. We recommend skipping the launcher archetype, as the Gold and Polyatomic challenges for them are quite annoying.
Note: Unlocking Orion On New Weapons
You’ll need to unlock Gold, Platinum, and Polyatomic camos to access Orion on newly-released weapons, even if you’ve already completed the Orion camo grind. Plan your camo grind skips accordingly.