User blog comment:KATANAGOD/CoD Wiki News - November 16th, 2014/@comment-2163805-20141116105654/@comment-3967954-20141116123727

The S-12 is poor; terrible range and accuracy, and (despite the drum magazine) a tiny magazine capacity. Like the XMG, Sledgehammer's logic with the S-12 seems to be "Well, this gun would be overpowered in theory, so let's just nerf it to be on the safe side".

I seriously hope they're going to buff some of the guns in AW, particularly the XMG. I think, considering I have completed every marksman challenge for it, I am qualified to say that it is utterly, utterly shit. I seriously doubt Sledgehammer actually sufficiently playtested some of the weapons before plonking them in the game. Shame too, because otherwise it's a perfectly solid game.