He has two Spartan weapons, a Sniper Rifle and an M6G Magnum
I have only detailed the build of the helmet here but you can see
the Complete Build here.
October 27th 2009 - I have just added pictures of the new helmet, chest plate, should shields and shotgun I built to modify the Master Chief costume from last year into a Halo Scout for this year.
The first photo shows how I traced the outline on another piece and then drew about a 1" larger outline. I made sure both halves of the oval lid were symmetrical. I 'tabbed' the oval as seen in the second photo to fit inside the tube.
The last photo shows the flat piece hot glued to make the 'bucket'. Center lines drawn for reference.