Given the trailers by InfinityWard earlier today I took the time to break them down and try to pick out some of the weapons in COD Ghosts.
In the picture shown the gun looks like a M-Tavor 21 with a grip and a some sort of scope.
The next(not in the picture) would be a SMG of sort, at one angle it looks like a Ump upper part of the gun and the next angle it looked like a peacekeeper\/ump with a grenade launcher attachment.
There were more guns such as what appeared to be an AK,M4A1, and a LMG.
Remember InfinityWard did say that the guns in ghosts were not seen in any other Call Of Duty game.