Pros:

-Great Texture
-Makes the game more modernized when using this.
-Really great when viewing an another survivor carrying the weapon in third person.

Cons:

-In first person view, the weapon view needs to change (since it is the same boring view with the default SMGs.)

Conclusion:

Really good add on to use.  It will be better if you change the first person view or allow other animated weapon addons to change the view.   Other than that, keep up the good work :)