So what bat does she use?
It has to be a bat that would be light enough to be flourished, but heavy enough to crack skulls. Too heavy and the bat would become less of an asset and more of a burden against zombies.
Why this bat?
For starters, fungo bats are used by coaches for baseball practices everywhere. They are held with one hand as the coach lobs and hits balls with the other. They are light and easy to swing. Their tough aluminum alloy makes them durable enough to fight off the undead.
This particular bat is special though.
It has a great balance to it. If you hold it just above the knob and flex your wrist to spin it, you will note that it feels like you're swinging a light sword or even a... lightsaber? ;)
So there, you have it. Ashley's choice of weapon and, in my opinion, the best blunt weapon you can use during a zombie apocalypse.