How to use:
Launch the executable.
Choose a high recoil gun recoil gun or medium or low recoil gun.
I recommend looking at if your gun has a recoil medium, low or high, then you know which option to use.
Once you've selected, enter the game and and when you want (I recommend when you are on map) press f6.
The recoil will decrease greatly, and will help give some headshots.