Marathon: 2x sprint duration.
Marathon Pro: Faster climbing and mounting, no falling damage.
Bandolier: Extra magazines for both weapons.
Bandolier Pro: An extra lethal and tactical grenade.
Bling: Two primary weapon attachments (excluding underbarreled).
Bling Pro: Two secondary weapon attachments or allow underbarreled attachments.
High Roller: "Steal" enemy COD Points (depending on gamemode) through headshots and backstabs.
High Roller Pro: 1.5x (or 2x) experience from anything XP related (forfiets primary weapon).
Camoflauge: 33% invisibility when prone (makes soft hum noise when close by).
Camoflauge Pro: 75% invisibility when prone and 33% when crouched (soft hum when close by).
Hardline: 1 less kill for killstreaks.
Hardline Pro: Re-roll care packages.
Stopping Power: 1.25x increased bullet damage.
Stopping Power Pro: Increased damage done to killstreaks.
Juggernaut: 1.25x increased resistance to bullets.
Juggernaut Pro: Survive one knife slash.
Danger Close: 1.25x increased explosive damage (excludes grenade launchers).
Danger Close Pro: Grenades and Semtex can be set faster and thrown further.
Flak Jacket: Increased protection from explosives (same as B.O.)
Flak Jacket Pro: No fire damage and toss back enemy grenades.
Cold-Blooded: Invisible to UAVs.
Cold-Blooded Pro: Invisible to enemy killstreaks, turrets and no red name or crosshairs.
Lightweight: Faster movement.
Lightweight Pro: Jump higher and further, faster knife recovery.
Sleight of Hand: Faster reloading.
Sleight of Hand Pro: Faster ADS and weapon switching.
Steady Aim: Increased hip-fire accuracy.
Steady Aim Pro: Faster Aim after sprinting and hold breath longer when scoped.
Ninja: Invisible to Motion Sensors, Heartbeat sensors, etc.
Ninja Pro: Silent footsteps, does not trip claymores if crouched or prone past them.
Bomb Squad: See enemy equipment and turrets (with COD4 symbol).
Bomb Squad Pro: Turn enemy equipment and killstreaks friendly, booby trap care packages.
Deep Impact: Increased surface penertration
Deep Impact Pro: Reduced flinch and increased flinch damage.
Reconissance: See enemy turrets, equipment, killstreaks, dogs and airstrike locations.
Reconassince Pro: Appear as a friendly on the enemy radar.