Wildcards are loadout adjustments that offer options like two primary weapons, extra perks from the same Tier, extra lethal grenades, and even extra attachments.
Overkill
Take a Primary weapon in you Secondary weapon slot.
Unlocked: Default
Primary Gunfighter
Take a third Primary attachment.
Unlocked: Level 5
Secondary Gunfighter
Take a second Secondary attachment.
Unlocked: Level 5
Perk 1 Greed
Take a second Perk 1.
Unlocked: Level 17
Perk 2 Greed
Take a second Perk 2.
Unlocked: Level 17
Perk 3 Greed
Take a second Perk 3.
Unlocked: Level 17
Tactician
Take an Exo Ability in your Exo Launcher slot.
Unlocked: Default
Bombardier
Take an Exo Launcher in your Exo Ability slot.
Unlocked: Level 27
Streaker
Take a fourth Scorestreak.
Unlocked: Level 37