It would have limited application, I think, because of the bulk it adds. And I don't know how quickly the plastic/lexan top shield would stay free from obscuring scratches. Or how misted up it would get in wet weather. A bullet impact could also render that top shield opaque enough to be worthless. But better the shield is messed up than the face or eyeball of the user.
But think about it... You could make that shield the red dot scope reflector.
I think a SWAT adoption is more likely than an army adoption.