It's probably connection, I use it just fine on the PC version where there's only one guy lagging as opposed to one guy making everyone else lag. --- Russian is my first language, so yes there may be a spelling error or two. I <3 Jesus.
See, I'm a weird case on the XM8. I sucked with it at launch, and after it was nerfed, I started doing much better with it. I honestly think it's one of the more interesting guns in the game, and one of the better ones, though it is most certainly true that a poor, or even a mediocre connection can seriously screw you when you use it. --- Soon to be hosting Critical Hit game and movie reviews via YouTube.