This is the Toxin Rifle designed for the free-to-play online FPS, Renegade X. It is a sniper rifle with chemical shots used by NOD.
https://renegade-x.com/
* 3Ds Max for modeling
* Zbrush for retopo
* Rizom UV for UV mapping
* Substance Painter for texturing
Special thanks to Sketchfab users Thunk3D and valerij1987