Actually, its not restricted to the MKB. In some cases, say, the MG34, when you fire even a small burst the game stutters right at the end of the burst, like it skips a beat or something. Really annoying. Same for MKB. Makes it near impossible to kill its user, on account of it making me stutter. I say broken sound because the MKB's sound is accompanied by that annoying background crackling sound, that you can tell it's bugged. I don't know if it's only in the MKB, but it certainly is the most noticeable.