Really? A mere 12 years into the future is "too futuristic"?

A majority of things in BO2 exist in some shape or form; based on/currently existing weapons (MP7, Vector K10, Skorpion EVO, M27, AN-94, Remington 870, Saiga 12, etc), are/were prototypes/paper planned/cancelled (XM8/M8A1, etc), etc.

And even the few things that are a bit more ahead aren't exactly impossible to conceive, like the CLAW or the Dragonfire and such.