Should have said "lack of imagination" or "failure of engineering for optimal marketplace penetration" or "boneheaded" ...
Why did they use a custom design that is very similar, but incompatible, to a common, effectively standard/open solution. Maybe there was some compelling mechanical or geometry reason that is not immediately apparent, at least to me. The mask-frame mount does strike me as a ghetto-elegant design, and solves the 2-window issue, but the zip-ties do seem a bit half-assed for a $1k+++ product. Regardless of cost factor, mask fit can be difficult for some of us ...
OTOH, I wonder if that means there is a ready solution for the KM M-48 Mod 1s? I thought that the combat swimmers were using them.
KM M-48s are on my "try" list. I wouldn't think the HUD would be at all noticeable on one of them.