This thread should probably be in Zombie Combat Tactics. I'd say it should be in Firearms under General Firearms Discussion, but Dave would just move it to ZCT anyway.
The zombie section doesn't really seem to have much to do with zombies. You've got some good content; the Metalstorm MAUL is new to me. I don't really have any criticism of it as a gun website, just that the "zombie" content feels really tacked-on. So, my advice, and I have a feeling this isn't the kind of advice you wanted is to:
1. Ask yourself, "Why should my gun website have a section about zombies?" (Hint: "Everyone else is doing it" isn't a good reason.)
2. If you can't come up with a good answer to #1, just strip off the "zombie" language and keep on running your gun website, sans zombies.
3. If you DO come up with a good reason for #1, then include an explanation of it on the "Zombies" page (i.e., "planning for zombies helps you plan for disasters, and 'zombie' can be loosely interpreted as meaning 'any situation of major, local, national, or global disaster or collapse requiring self-defense and self-reliance'") so your readers know why you're talking about zombies all of a sudden. Your mentions of zombies in each article should serve this purpose (not necessarily my example, but the reason you decide on).
4. Remember: a gun website that doesn't mention zombies, is not necessarily better or worse than one that does mention zombies. Do whichever one makes YOUR website better, or more what you want it to be.