I mean that in MW2 and MW3, the M4, G36, M16, Famas, and I'm sure others, all use the 5.56x45mm NATO ammunition, which should mean they all do the EXACT same amount of damage, but they don't. It's all adjusted to make it even, which is, unrealistic.
Next gen bridge, supposed to be the first COD where one can customize everything about the soldier as well as the load-out, similar to Black Ops II with the points system.
Customization of the entire soldier will not be too different from Tom Clancy's Vegas 2.
Multiplayer:
General...