An early directive for Carter was that he should feel like a cowboy. You can sort of see that in the hip armor that sits in the same place as a belted gun holster might.
Emile hates the Covenant with a passion. The skull on his face plate is less of a macho symbol, and more like saying "you've just been killed by a hunting trophy" Its fueled by anger and indignation, and he's effectively spitting in his enemies faces.
You can see the kill marks in Covenant blood on Jorge's left shoulder pad...the side that faces the enemy. This aspect of his personality doesn't show much in the game, but its a left over habit from his origninal Spartan II squad. He continues the tradition out of reverence.
At one point we were considering making it possible to break down the sniper rifle...that idea was abandoned but you can see here an idea of how it would be stowed. This was also an earlier version of Jun's helmet. It was a bit hamfisted, but really communicated beyond a doubt that he was the sniper of the team.