Take your pick on what hes firing at, but this is Onyx in a more natural environment. I honestly love powered combat armor like this, Starcraft was one of my first beloved games, and I always loved the universe even before WH40k. I enjoy both now, but... SC comes out ahead for me.

I got this from  Skyflu
Original: https://www.furaffinity.net/view/34712113/

Give the artist some love, very well done stuff and very nice to deal with.