Just a D.va gun. There have been others out there, but some have been taken down! I designed this myself and in the future would possibly like to add LED's and/or an actual trigger action that makes sounds!
I also added the joining polygons as kind of an experiment to try to make it more accurate when gluing the gun halves together. It doesn't fully work how it is, the polygons need to be almost half the size they are I believe.