Hmm. Well I was thinking that other servants with high enough agility might be able to employ enough anime laws to go jedi on whatever Ned shoots. However, if you're concerned about it, might it help to impose a need to reload? The rifle only holds one bullet at a time in real life and the revolvers hold six each. I wouldn't expect any mad-enhanced servant to be a great marksman with them in any case.

If it needs a more serious nerf I could just as easily remove the revolvers on top of the reloading thing.