Unlock the following Professional perks by performing the corresponding tasks:
HOW TO UNLOCK
Get 200 kills using a weapon that has two attachments. This will allow you to use two primary weapon attachments and two secondary weapon attachments.
Destroy 40 enemy Killstreak rewards with the Cold-Blooded perk. This allows you to be undetectable by UAV, air support, sentries, and thermal imaging. It also removes the red crosshair or name when you are targeted.
Get 20 melee kills with the Commando perk. This will increase melee distance and you will not take damage when falling.
Danger Close Pro
Get 100 kills with explosives with the Danger Close perk. This will increase explosive weapon damage and extra air support damage.
Get 40 Killstreaks with the Hardline perk. This changes Killstreak rewards to require one less kill and Deathstreak rewards to require one less death.
Run 30 Miles with the Lightweight perk. This will make you move faster and quickly aim after sprinting.
Run 26 Miles with the Marathon perk. This will give you unlimited sprint and allow you to climb obstacles faster.
Get 50 close range kills with the Ninja perk. This will make you invisible to heartbeat sensors and silent footsteps.
Resupply 100 times with the Scavenger perk. This will allow you to resupply from dead enemies and get extra magazines.
Get 50 close range kills with the Scrambler perk. This will jam enemy radar nearby and delay enemy claymore explosions.
Destroy 120 detected explosives or tactical insertions with the Sitrep perk. This will allow you to detect enemy explosives, tactical insertions, and loud enemy footsteps.
Sleight Of Hand Pro
Get 120 kills with the Sleight Of Hand perk. This will allow you to reload and aim faster.
Steady Aim Pro
Get 80 hip fire kills with the Steady Aim perk. This will increase your hip fire accuracy and allow you to hold your breath longer.
Stopping Power Pro
Get 300 Kills with the Stopping Power perk. This will increase damage given to enemies and enemy vehicles.