I may post some hats I've made here, I'll start of with the front view of a mask I made in about 15minutes, my reference for it was the last helmet you can get in the app StarWarfare as I thought it looked pretty cool.
*Updated with the Commando Helmet from Halo Reach. I did an older version of this about a year or 2 ago and so decided it needed an update. I will be doing the same to my Master Chief helmet next.