So he is about to go the movies with an assualt rifle and dressed in a tactical vest? Sounds familiar...

In all seriousness though you probably shouldn't arm your character with an assualt rifle in the very first chapter, kind of takes away from the whole survival horror aspect if he can just mow down zombies with it. Just a suggestion.

i'm sorry but I have to tell you this, I know its your first fanfic and this mistake is common, don't say that the main charach ter recognizes the zombies from a movie

So what happens next?

And is Justin the friend of Sean still alive?

story's good but you need to use "speach marks"

Bob:...brains...