dusty rain
It would be an easy way to add the dynamic light searching/stealth gameplay that everyone has always wanted so that NVGs aren't the obvious default choice, without having to actually add dynamic lights all over every map manually
The gadget would just be a simple LED light that reaches much further than the gun attachments but they can be easily destroyed for people trying to be stealthy
The helmet should replace your NVGs and be activated with a similar animation so that you can't spam it too fast
And it could be used as a cosmetic helmet choice even on day maps but you just won't be able to turn it on like how you can't use NVGs on day maps
burnt hearth
hot lance
north smelt
