User blog comment:Thedrag0n22/AK-130 android visors?/@comment-168.156.99.14-20131206183157

Okay, this is Making Answers Up time here:

The AK-130 heads-up display system is relatively fragile, so they're stored when not active. Having it visible all the time would put it at risk in case of tripping, being hit by a car or wrecking ball, or other things. Making it an integral part of the body would have made for a vulnerable point. ("Shoot the visors!  The armor's lighter there!")