I was looking at the Halo Reach picture and I pointed out my thoughts about it here:
[url]http://i609.photobucket.com/albums/tt173/Alex_Mercy/haloreachnew.jpg[/url]
[Edited on 06.22.2009 6:13 PM PDT]
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The one with the 'Tail' is a Spartan looking down with a Chain gun. The 'Tail' is the ammo for the Chain gun.