What, you couldn't arrange the guns near the bow or stern in a pattern that wrote the Cry of Gimli's name in letters dozens of kilometers tall and wide?
Arranging them would imply that spaces would have to be present so that the name could be read at all.
That's space that could be used for guns.
Alas, that would take away from the pitch black paint job making it a giant pane of darkness that slides through the stars whilst carrying weapons as to make solar systems quake in fear.