Board Thread:Questions and Answers Forum/@comment-66.211.116.22-20150718155007/@comment-24057866-20150719004056

The armor attributes (intellect, discipline, etc.) stack.

Armor perks don't stack. Equipping both a helmet and gauntlets that provide increased grenade throwing distance won't make your grenades go further than if you just had one, and having both chest and leg armor that increase the amount of ammo you can carry for a particular weapon type won't increase it more than if you just had one equipped.