1. Crossbow w/
--sharpened steel-tip bolts
--sharpened-tip bolts covered in napalm which I could light via lighter
--shotgun shells attached to the front of yet more bluntheads to act as explosive tips (actually easier to make than you'd think)
2. 7-inch combat knife with brass knuckles as the hilt
3. .38 revolver (easier to reload, cheaper, and with more ammunition available)
Ranked in terms of preference in combat--the crossbow is my primary weapon, followed by the knife for close-quaters combat, and the .38 is for use against human raiders/bandits and in case of emergencies (I'm surrounded by ghouls and there isn't anything to be lost by making noise, for example).
I'm seeing a lot of katanas being thrown around on this website, but the sad truth is that if you somehow manage to buy one that won't break on it's own during your first life-or-death conflict, you yourself will break it because you don't know how to properly use it unless you've spent literal years practicing to perfect the art.
This is why I go with my earlier post, excepting that I changed my mind from a .38 to a .22 revolver and that I would rather have a 10-inch blade instead of a 7-inch.
I mean, could probably pick up a katana and kill somebody with it. Anybody could. But if you want to keep that same katana to kill things with later then you need to know how to use the damn thing, and if you want to kill somebody easily and without hurting yourself then you need to know how to use it. Just being able to use something doesn't mean you're proficient in the proper use of that item.