www.bungie.net | halo.bungie.net | bungiestore.com
why doesn't your armor work as protection
the bullets in the future are really really strong, and your armour reduces the damage otherwise you would die in one hit.(speculation completely there) but i thnk the real reason is gameplay...
It does, it is just that in MP they made the Chief weaker than usual.
This has been discussed MANY TIMES!!! They did it to make it more balanced while playing. You would be almost idestructible if your body armor was super strong PLUS you had oversheilds.