Hot answers tagged mass-effect-3
No, the squadmate ammo bonuses are not stackable. The ammo power which was utilized the latest will override the effects of any previous one - regardless of whether the powers were the same or not. So in your case, I believe that you'll be able to apply that +50% boost to ammo power to all three of your squadmates. Only once though.
Only top voted, non community-wiki answers of a minimum length are eligible