User blog comment:HazelQuill7445/Awesome fan art/@comment-25936766-20180704225950/@comment-25936766-20180705012303

Do not compare Archer's shots to mere nukes. He's using magic, specifically magical recreations of weapons, like Caladbolg (AKA Proto-Excalibur). And if he's not using the weapons he's blowing them up.

Servants cannot be harmed by something as low as man-made weaponry. The only way they can be harmed by it is if you add mana (magic) to it. Which is the case with just about any Servant-made projectile.

Even a weak-ass Servant with a tiny, rusty pistol that's 400 years old will accomplish much more in a single shot than you ever would if you shot a gattling gun in perfect condition at a Servant's face for hours. Yes, even a Caster, the fragile glass cannons they usually are.