It’s not like it’s scoped for sniping, that’s probably a 1.5-2x scope for just SLIGHTLY better accuracy, and a bayonet is never a bad idea. Unless it’s a zombie attack, in which case my opinion is blunt and edged weapons are BAD because of the risk of infection by blood transmittal.

The problem I can foresee (for me at least) is that you (I) can’t move fast in plate mail. I say go with jeans, and leather jacket, which should give you a bit of armor against teeth (which is about the only weapon most zombies will use), and still leave you fairly mobile (possibly gloves, if you want to cut the fingers off so you can shoot better, your choice). My problem with a ski mask is, it still leaves your eyes and mouth exposed (depending on style), so I suggest some form of sunglasses, or protective goggles, instead. And, I’m not saying a big knife won’t come in handy, but I would certainly prefer to use my guns until they run out of ammo before switching to a close quarters weapon like a sword.