This Sci-Fi rusty missile turret is:
Rigged (Skeletal mesh with Vertx Groups defined)
Contains one animation (Turn and shoot)
Is UV unwrapped (UV 0)
But I still hope this can help someone as an asset for their project :)
However you may need to adjust some details in blender before exporting so it will work with Unity or UE4. I so far have had little luck making everything work.
On this one animation works (magic)