How do you get security shoulders? I got the marathon man achievement and i still don't have them. My friend has more than 750 gamerscore and he also did t he achievement but he doesn't have it either.

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Bungie said awhile back that there was a glitch in the actual game where if you even got all the achivements it wouldn't unlock all the body armor. So you need to do a update on ur Halo 3 game and then it should unlock all the armor.

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