I just picked up the beta and don't see a keybind for NVG - just gas masks.

Night vision was so cool in the last game, will it (and night missions) be returning to Sandstorm?

I hope so!

They aren't in the game right now because there aren't night maps. Hopefully night maps make a return, but in the last game I never used the goggles. Night maps weren't completely dark; the goggles just made your vision monochromatic and grainy.

That is exactly what i thought about the NVG´s in Insurgency2.