Maybe more of a wish than a bug - sorry for that. I think that it would be great for the VS-98 to take more scopes than just the ACOGs. If it really is intended to be a military sniper rifle then it should not be outclassed in regards to optics by CR 527, Blaze etc.
It is probably by design but it would be nice to understand the reasoning behind not having it's own integrated scope like the SSG (but with higher magnification).