Most of the weapons In ND are just reskins.
Look at the video where they are going through the loadout wheel.
It's literally everything in FC5, with the exception of the sawblade launcher -which doesn't even seem to actually dismemberment as you would expect- and the scissor knife which is an odd choice to make an improvised weapon out of considering the abundance of knifes and pieces of metal you could just as easily make a shiv out of both before and after the apocalypse.
But nope, for some reason knives were banned in the US pre apocalypse and only scissors survived.
Even looking at the truck on the ND forum splash screen; it's just a reskin of the farm truck we currently have ingame.