I found this over the internet. Also Youtube Enjoy!

Perk Slot 1

Extreme Conditioning: Sprint longer distances + Climb obstacles faster

Sleight of Hand: Faster reload + Faster weapon swapping

Scavenger: Reload ammo from bags + More ammo to start

Blind Eye: Undetectable by support stuff + Launches lock on faster + extra damage to support

Recon: Explosive damage paints target on mini-map + Bullet damage paints targets

Perk Slot 2

Hardline: 1 less kill required for killstreak + 2 assists count as one kill towards killstreak

Assassin: Immune to UAV, Portable Rader, thermal and heartbeat + Immune to Counter-UAV and EMP

Overkill: Carry two primary weapons + 2nd primary weapon can use two attachments

Quickdraw: Faster ADS + Faster recovery from throwing grenades

Blast Shield: Like Flak Jacket + Immune to stun and flash grenades

Perk Slot 3

Sitrep: See enemy explosives + Hear enemy footsteps louder

Dead Silence: Move silently + No fall damage

Stalker: Faster movement while ADS + Delay Claymores

Marksman: Tag targets from long range + Hold breath longer when scoped

Steady Aim: Increased hip fire accuracy + Faster ADS after sprinting

Assault Killstreaks
4 Kills Care Package
5 Kills IMS (3 or 4 landmines that cannot be stunned or flashed.)
5 Kills Predator Missile
5 Kills Sentry Gun
6 Kills Precision Airstrike
7 Kills Attack Helicopter
7 Kills Little Bird Flock (Mini helicopters that patrol the map.)
9 Kills Little Bird Guard (Big helicopter that follows you.)
9 Kills Reaper (Mortar Team with 5 predator missiles.)
10 Kills Talon (Mini Tank, like the one in Homefront)
12 Kills AC-130
12 Kills Pavelow
15 Kills Juggernaut Armor (Juggernaut suit from Spec Ops)
15 Kills Osprey Gunner (Chopper Gunner that drops an emergency airdrop)

Support Killstreaks
4 Kills UAV
5 Kills Counter-UAV
5 Kills Ballistic Duffel (Entire team gets Juggernaut perk until they die.)
5 Kills Airdrop Trap (Drops hacked Care Package)
8 Kills SAM Turret 10 Kills Remote UAV (Target enemies with missiles)
12 Kills Remote Turret (Sentry Gun you can control. Works like Camera Spike in Black Ops)
14 Kills Stealth Bomber
18 Kills EMP
18 Kills Juggernaut Armor (Care Package drops armor)
18 Kills Escort Airdrop (Same as osprey gunner, except you dont control it, and it drops 4 care packages, and 1 hacked care package.)

Specialist Killstreaks
2 Kills Gain an extra Perk
4 Kills Gain an extra Perk
6 Kills Gain an extra Perk

Deathstreaks
4 Deaths Juiced (Lightweight)
4 Deaths Martyr
4 Deaths Final Stand
5 Deaths Revenge (Last person that killed you is now on your radar)
5 Deaths Stopping Power (Only for one kill)
6 Deaths Dead Mans Hand (Suicide bomber)

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