Launchers are weapons which fire explosive projectiles that are featured throughout the entire Call of Duty series. In Call of Duty 4: Modern Warfare and Call of Duty: World at War, they are available only as perks, however, in Call of Duty: Modern Warfare 2, Call of Duty: Black Ops, Call of Duty: Modern Warfare 3, and Call of Duty: Black Ops II they are available as secondary weapons.
Panzerschreck - used by the Nazis. Can be obtained in Campaign and Multiplayer. In the mission "The Mace" you need to equip a Panzerschreck to destroy a tank. In multiplayer it is used by the Wehrmacht (Axis)
Bazooka - Used by the Allies. It is used by the Americans (Allies) in Multiplayer.
In campaign mode, the player can obtain a Panzerschrek in many Soviet missions. It behaves in a similar way to the bazooka, the only difference is that it has a blast window of sorts which limits peripheral vision, as well as being much less accurate. The Bazooka can be obtained in the levels Hard Landing and Downfall.
The only launcher available in Multiplayer is the Bazooka, taking the form of a Tier 1 Perk, much like the RPG-7 in Call of Duty 4. The Rifle Grenade is once again available as an attachment, also using the 1st Perk slot.