Zombie killing weapon-gun of doom

Okay, it’s not called the “weapon-gun of doom” as the official name for this weapon is the “Zombie-X exterminator”. Obviously.

What do you think about the chainsaw attachement? Is that really going to cut it? Excuse the pun. Here’s another thought; do you want simple and re-usable weapons for the zombie apocalypse or do we want tech? Many of us have found ourselves facing the on-coming hoard in Left 4 Dead 2 just as the chainsaw runs out of juice.