I would say you were inspired by the Lionguard, but that headpiece does not fit at all. To fit with it, try to combine some steampunk or Asura pieces, like Inquest armor or Forgeman armor. Or replace the helm with another headpiece. To get the critics and opinion, you need at least 3-4 screens from different locations. Also some decription would be fine, so we can understand you choice of dyes and armor. Try to browse some looks here and search for inspiration.
The name was his clue, Master Chief is the character's name. If you are not familiar with Halo then it's understandable that you didn't connect the name of the look with his overall goal.
