just the way it works is just poorly done in my mind. you should have made a new model for the rifle instead of just sticking a skin on it and leaving it at that.
Root keep in mind this started as a simple AR skin made to match a skin theme he was working on for warlocks. It has since been expanded into a proper mod because of suggestions and advice.
Bleh it became warlock in H2/3. Just shows how much I actually play halo.
Also, it's possible to have multiple shots even without the shotgun. You'll of course want a decent spread so that it becomes clear they separate otherwise the effect is lost.