This mod for the Ops-Core FAST Helmet includes a number of options to enhance your headgear, including more colors for the visor for the helmet itself.  There is an option for you to enable the helmet's night vision, which will allow you to see in the darkness.

If you are experiencing issues with this mod or the Ops-Core FAST Helmet, you may find that the issue is largely self-correcting and due to an issue with Fallout 4 itself not loading the models at the same time rather than issues with this mod or the Ops-Core FAST Helmet.

To fix, you may try the following:

You can try to toggle and cycle through the modes repeatedly until the problem disappears.

You can also try to wait for some time to load the models.

You can also acquire Schematics and Craft night-vision goggles and Toggle Switch