User blog comment:Damac1214/Treyarch hints at Black Ops II Multiplayer trailer/@comment-5207163-20120725164141/@comment-2045634-20120725182709

It's possible. I mean we still use the M16 today since the 60's or even the AK-47 from the 40's. But I'm sure that Treyarch is more focused on near-future weapons. The only thing that's odd is why the XM8 is in the game. Our military is preferring the SCAR H/L & HK416 over every other rifle to replace the M16 & M4. And after field tests the XM8 has already been declared an unreliable weapon. Still looks cool though.