 | Lightweight: Faster movement speed. Speed increase unknown at this time. Lightweight Pro: No fall damage |
 | Scavenger: Resupply from dead players. Scavenger Pro: Start with extra ammunition & replenish tactical grenades |
 | Ghost: Unable to be detected by enemy radar. Previously Cold Blooded in MW2. Ghost Pro: Undetectable by aircraft, dogs, IR, and sentries. No red crosshair or name when targeted. |
 | Flak Jacket: Reduces explosive damage Flak Jacket Pro: Immune to fire damage and allows you to safely toss back frag grenades. |
 | Hardline: Killstreaks require 1 less kill to acquire. Hardline Pro: Change the contents of a Care Package. |
Perk Slot 2
 | Hardened: Increased bullet penetration. Previously FMJ attachment in MW2 Hardened Pro: Bullets do extra damage to aircraft and turrets. Reduced flinch when you are shot. |
 | Scout: Hold breath longer during weapon scope Scout Pro: Faster Weapon Switching |
 | Steady Aim: Increased hip fire accuracy. (smaller aiming reticule spread) Steady Aim Pro: Quicker aiming after sprinting and quicker recovery from knife lunge. |
 | Sleight of Hand: Faster reloads. Sleight of Hand Pro: Faster aiming down sights with non-scoped weapons. |
 | Warlord: Allows 2 attachments on primary weapon. Previously Bling in MW2 Warlord Pro: Start with 1 extra lethal and tactical grenade (except smoke) |
Perk Slot 3
 | Marathon: Longer sprint duration Marathon Pro: Unlimited Sprint |
 | Ninja: Silent footsteps Ninja Pro: Louder Enemies and you're completely silent. |
 | Second Chance: Pull out your pistol before dying Second Chance Pro: Survive longer, and any teammate can revive you. |
 | Hacker: Detect enemy equipment & explosives through walls. Hacker Pro: Can sabotage enemy equipment, turrets, and crates. Invisible to motion sensors. |
 | Tactical Mask: reduces effects of flashbangs and concussion grenades. Tactical Mask Pro: Reduces the effects of the flash and concussion grenades. Reveals the position of a flashed or stunned enemy. |
