The model is well done! looks like the backburner from TF2.
I wonder if the stats could change to something more of a fun concept like the bullets when hit the ground forms fire for a few second like creating a fire trap/wall for enemies to get hurt in but any other concepts would be fine. In my opinion I find half fire half not to be a bit bland for this weapon to stand out alone. But what ever choice you make is fine with me.