Sprinting Zombie Vampires

I saw I Am Legend. On DVD.

If the coming zombie apocalypse is gonna be full of well muscled sprinting vampire-zombies with no pain of fear, then I want NONE of it.

But Will Smith had some M4 derivative for a carbine, and a plastic sidearm. It could have been a Springfield XD, but I don't my handguns on sight like some of youse.

The M4, (a shortened M-16 for those not up on what's in the current US inventory,) is not the best deer hunting rifle, but it'll do in a pinch and in the application Mr Smith was using it for.