You will need AHK for this.
Create a new .ahk file and paste this code.
Code:
V:: Send, i sleep, 1 MouseMove, 55, 450 sleep, 1 Click sleep, 1 Click sleep, 1 Click sleep, 1 Click sleep, 1 Send, i return
MouseMove, 55,450 are the x-y horizontal values where the helmet sits in the inventory. Make sure you have multiple helmets in the first slot of your inventory.
These values are correct for a 1920x1080 fullscreen play.
If you're using a different resolution your screen becomes smaller and so you will need to tweak the 55,450 to something that is correct for your resolution.
1= is simply how fast it's opening your inventory and picking a helmet.
I do not take credit for this as the code is for free elsewhere. All credits to the original release. I simply changed values that worked for me.
Make sure to press that V once your helmet clicks off from an incoming shot. You will see it doing it's magic.






