LMGs

This is a list of the LMGs / Light Machine Guns that will be featured in the Black Ops 2 multiplayer. So far, these are the only ones that have been confirmed as being legitimate. Note that this list does not include weapons found in the single player campaign mode. All of this information came straight from those who got to play the game at Gamescom:

LSAT

The LSAT LMG was developed in the USA and Germany after the Joint Service Small Arms Program challenged the defence industry to design lighter guns and ammunition. This particular weapon appeared in the Black Ops 2 multiplayer reveal that was released in August, 2012.

LSAT

QBB-LSW

The QBB-LSW was developed in the People's Republic of China. It has been in services since 1997. It is actually a LMG variant of the Chinese Type 95 family (if you remember correctly, the Type 95 was a burst-fire weapon back in MW3). This weapon normally uses heavy magazine gun cartridges that have long range and some insane power.

QBB-LSW

MK 48

The MK 48 boasts 100 rounds per magazine and a full automatic fire rate. Developed in the USA and Beligium, it is currently used by USSOCOM and has been in production since 2003. Although the screenshot below is from the single story, it's safe to say that the MK 48 look exactly the same in the multiplayer mode.

MK 48