That is bad ass. I remember I had a Master Chief helmet but it wasn't to be worn it was more of a display it ever nad it's own stand underneath it. Sadly I lost that helmet. I got it from my old neigborbor's yard sale a long time ago for $1.
The Helmet was a Kit from Sean Breadly, those Helmets arenīt available anymore.
The Build-Up and everything else was made by me, also the Module, wich has Lights.
I can make Helmets too. Regular Helmet-Builds are made with Pepakura, then reinforced with Urethane and / or Fiberglas, smoothed and detailed with Bondo. Then Molding with SmoothOn Silicone. Casting with SmoothCast 65D.