M.O.A.B. (25 Kills)
The Mother of All Bombs occurs when a player has achieved a kill-streak of 25 kills without dying.  The MOAB does not end the match as the 25 kill-streak did in MW2. Additionally you do not need to have the MOAB activated as a kill-streak to use it.

Assault Strike Package

UAV (3 Kills)
Show enemies on your map for 30 seconds.

Care Packages (4 Kills)
A care package is dropped on the map containing a random killstreak.
Tip: extremely effective when you use with Hardline Pro. 

I.M.S. (5 Kills)
An Intelligent Munitions System is triggered when an enemy runs past it. 
Tip: hide your I.M.S. around corners and darker areas of the map. 

Predator Missile (5 Kills) 
Remote control a predator missile from an overhead view.
Tip: you can also destroy helicopters and other vehicles.  

Sentry Gun (5 Kills) 
Airdrops a sentry gun that you can place on the map. 
Tip: try to place the sentry gun in corners, where the enemy cannot sneak up from behind to destroy.  

Precision Airstrike (6 Kills)
Allows you to call in a directional airstrike.  
Tip: make sure the arrow is in the direction that you want the line of bombs to land.  

Attack Helicopter (7 Kills)
A helicopter is called in that attacks enemies randomly around the map.

Strafe Run (9 Kills)
5-Helicopters come in and sweep a selected area. 

AH-6 Overwatch (9 Kills)
An AH-6 Overwatch flies in and hovers over you to provide protection.
Tip: hang out in areas where the enemy is likely to be so the AH-6 can wreak havoc.  

Reaper (9 Kills)
Use a Reaper-UAV to send 14 guided missiles to the ground.

Assault Drone (10 Kills)
Airdrops an Assaults drone that is equipped with a rocket and machine gun.  

AC-130 (12 Kills)
Be the gunner of an AC-130 for 30 seconds.  
 
Pave Lows (12 Kills)
Heavily armored assault helicopters fly in low and attack enemies.

Juggernaut (15 Kills) 
Airdrop a Juggernaut suit equipped with an M60E4 LMG and MP412 handgun. 

Osprey Gunner (17 Kills)
Be the gunner of an Osprey gunner.