The V4 was a Vengeance weapon (thankfully unbuilt), a rocket that could reach New York
The M4 is a highway in the UK....;)

M, as in the military alphabet, stands for Mike....and V for Victor(Victoria...hey, isn't that a movie?...;)

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)