Which optional rules do you use for muscle-powered weapons and armors?

[Rupert]

Originally Posted by Plane

Like if a 1d impaling (like an arrow: x2 injury) were made narrower (normal piercing: x1 injury) then wouldn't you expect there to be an armor divisor of 2 to compensate?

And indeed, that is exactly what happens - see the box "Bodkin Points (TL3)" (B277).