Looks very unbalanced. It's stats should be very low in speed.
I suppose also that piercing damage could be slightly rised as to me piercing is it's primary role.
But sorry, I have no modding skills. Just few thoughts.
Regards
Sorry man but theres nothing I can do, I've never modelled in my life (I guess WH&WH40K won't count ) + I'm not going to mod anything else either until we get the update/mod tools so we know about what we can do and what old things will work