Originally Posted by
Door Slider
Some fleets use the Alpha 928 helmet (MK 10 in mil speak) with Rigid Visor Cover.
This allows the user to use the visor and NVD simultaneously however, the distance from eye to google is increased.
Hahahahahahaha........oh, you were being serious?!! (Anvis maybe)
Assuming that the MK 10 helmet visor cover hasn't been butchered to make the ancient models of NVDs fit via a botch job of a bracket from another helmet design and then slap a huge counterweight on the back.
In answer to the OP, for some fleets the answer is generally sod all.