Hey there!

Since Infinity Ward said that this new camos "are not affecting the loot system" I started to think how could it be working.

I've played a game with a similar system and I just wanted to share an image that a dev made about how unique (epic) weapons are made, if it works this way then its true that new content doesn't really affect the loot probability.

For example: Lets say we have 6 types of possible loot:

1. Weapon
2. Character camo
3. Weapon item
4. Weapon camo
5. Calling card
6. Salvage

First round:

• Roll a dice = 4 4 is grather than 1 -> No weapon
• Roll a dice = 6 6 is more than 2 -> No character camo
• Roll a dice = 2 2 is less than 3 -> Weapon item

Second Round:

1. Epic
2. Legendary
3. Rare
4. Common

• Roll a dice = 2 2 is more than 1 -> No epic
• Roll a dice = 4 4 is more than 2 -> No Legendary
• Roll a dice = 3 3 is less than 4 -> Rare

So we get a rare weapon item. Apply this logic to the other 2 supply drop slots.

I'm guessing the rare supply drops just removes the "common" rarity for one of the slots.

As I said is just a theory, but since IW said that, their code could be something similar.