From Concept art to a 3D model
Stylized Flamethrower
Modeled in 3DSMAX
Detailing done in Zbrush
Painted in Substance Painter
Find the Model here: https://www.artstation.com/a/7584462
Rendered in Marmoset
you can purchase it on https://assetstore.unity.com/packages/3d/props/weapons/stylized-flamethrower-193880
Marmoset Viewer