After trying both the QBZ 3 and the VHS 2, I feel that the two guns are a little too good as of now. They basically crowd out the M4 and are seemingly much better overall than it. Their recoil, RoF and cost all seem to either match or be outright better than the M4. And while differences do exist in terms of things like penetration and velocity, they dont seem intelligible enough to make the guns distinct alternatives.
I think that they need to be adjusted in order to have clear distinctions between them and the M4, or alternatively, be put into a different price bracket (for example, the QBZ could easily be used as a G36K alternative for the insurgents with adjustments to recoil).