This is for people who don't know what the requirements to get a perk pro and what the (pro)perks do.

Tier 1

Recon - "Paint" an enemy to the mini-map with explosive damage.
Recon Pro - "Paint" 120 enemies, using explosives, to the mini-map - Ability to "paint" enemies to mini-map with bullet damage as well.

Sleight of Hand - Reload faster
Sleight of Hand Pro - Get 120* kills with sleight of hand as one of your perks - Swap weapons faster

Blind Eye - Invisible to enemy air support and sentry guns(UAVs do not count)
Blind Eye Pro - Shoot out 40* air support killtsreaks - Lock onto air support faster and extra bullet damage to enemy killstreaks

Extreme Conditioning - Sprint for a longer duration
Extreme Conditioning Pro - Sprint 26* miles - Climb over obstacles faster

Scavenger - Resupply ammo from dead enemies(Blue pack)
Scavenger Pro - Pick up 100 blue packs - Spawn with full ammo

Tier 2

Quickdraw - ADS(Aim down sights) faster
Quickdraw Pro - Get 120* kills using quickdraw and within a few
second of ADS - Throw/Equip letahl and tactical equipment faster

Blast Shield - Increased resistance to explosives
Blast Shield Pro - Survive 100* explosions using blast shield - Increased resistance to flashes and stuns

Hardline - 1 less point needed for pointstreak(e.g. 2 points instead
of 3 for UAV)
Hardline - 80 pointstreak rewards using hardline( Put hardline as your main perk and use specialist 1 kill for 1 pointstreak = 80 kills for Pro version) - Every 2 assists counts as a point towards your pointstreak and 1 less death needed for deathstreaks

Assassin - Invisible to Advanced/UAV, heartbeats and portable radars
Assassin Pro - 20 kills while using assassin and enemy UAV is up - Immune to CUAV and EMPs also no red name/crosshairs when targeted

Overkill - Have 2 primary weapons on your custom class
Overkill Pro - 120 kills using second primary - have an attachment and camo on second primary

Tier 3

Marksman - See enemy targets at a longer range
Marksman Pro - 60* kills while ADS and holding breath - Hold breath for longer

Stalker - Move faster while ADS
Stalker Pro - 80* kills while ADS - Delay Bouncing Betties and Claymores from exploding

SitRep - Enemy explosives and equipment flash red
SitRep Pro - Destroy 80* enemy explosives or equipment - Louder enemy footsteps

Steady aim - Increased accuracy when firing from the hip
Steady aim Pro - 120* kills while shooting from hip(Grenade launchers, shotgun attachments and akimbo weapons count towards this) - Weapon is ready faster after sprinting

Dead Silence - Make no noise when moving
Dead Silence Pro - 50* close range kills(Knife kills count) - No fall damage

* Means I don't know or I am unsure about the requirements for the pro version so post
below if you are 100% positive about the requirements so I can fix it.

Please thank as this took a long time to make.