Or you could do it like they do on old Battleships

Inline, stepped turrets? But then the hammer would have to be longer.
Or maybe they should square off the top and bottom sides of the hammer and put turrets on those sides?

Galen: Hmm? Oh, sorry. I was just trying to work out whether a comment from me right now would be 'most wanted' or 'least needed'.
Expect me when you see me.