There are two files

put the "first file" into the modoverride folder

BUT THE "SECOND FILE"

if you don't have the pmv mod download it

here is the link pmv

put the pmv mod in the mod folder then download the "second file" and put it in folder named saved which is in the mod folder

steamlibrary/steamapps/common/paday 2/mods/saves

if you already have the pmv mod you can remove the "perfectviewmodel.txt" which is in the saved folder and put the "second file" in the saved folder or you can copy the xyzs which is in the "second file" and add it to your own "perfecviewmodel.txt" in the saved folder.

I hope it's clear

my fov is 50% and resolution is 1366x768 if guns looked weird try to adjust them yourself using f7 key

here is a demo