I hate that gun! I don't use it but I die from it too much now xD
I think it's overpowered now. It's not fair when I shoot at someone with Grendel, he starts shooting with K-Volt, I hit him with 2 bursts and he still manages to kill me... and that story repeats multiple times, even with other weapons vs K-Volt (and it's not that my accuracy is low).
It was lame weapon, and now it's overpowered... Can Crytek simply balance it right one day?!