Gun Stock Calibration setting not able to be toggled?

My issue is that the use physical gun stock and gun stock calibration settings are not able to be turned on and are un highlighted. What’s up with that and why is it like that? Any help would be greatly appreciated.

I have a metal/plastic gunstock with a ton of adjustable points that I have already tweaked to a good spot for most games that have gun stock calibration that can be fine tuned. This is my first time on exfil zone so I’m pretty new to it.