Ahhhh! AR5 - or "how to practice bleeding" Wonderful piece of kit.........
However..As a shelter marshall during the cold war, I would have killed for one to replace my S6/10....
In the late 70s I came up with an idea for a `simple` method of getting uncontaminated food into the AR5 wearer. I demonstrated it to Bruggen crews at one point, and the idea went to RAFG for approval...Got as far as IAM, I believe, where it died a death....
About 10 years later the same (or a VERY similar) simple idea working on the same principles made it into baby food dispensers! Ho Hum.