I really regret the fact that you dropped the weapon pack. I also recognized the fact that the handgrip was placed "unlikely", however it was looking good ingame and I am sure you are aware that Christian1987 uses a custom anim for his M4s.
Vertical grips are currently issued and used widely, not all versions are very cute. I have seen pics of Marines using GRIP-POD bi-pod vertical grips on M16s and M4s. These grips are large and look really ugly on an M4, however they are used.
To come to the point:
Good weapon pack, I would recommend to make a seperate addon with these weapons included (just some config work) so everyone is free to choose the prefered version.
By the way I prefered your (or vilas) vertical grip placement since the anim works very smooth while c1987s version looks a bit strange if used on a model with short sleeves.