Since the Udemy listing is marked (last updated this year), it likely repackages the classic workflows with modern tips. Here is a projected breakdown of the modules based on current industry needs for sci-fi assets.
You might be wondering: Why 2.81? Blender is up to version 4.x now. It is a fair question. However, within the professional asset creation community, Blender 2.81 holds a legendary status. Since the Udemy listing is marked (last updated
The primary course matching your request is on Udemy , which focuses on a complete A-to-Z workflow for creating a sci-fi rifle . Course Overview within the professional asset creation community