I just bought a 2018 Bunk, with February 2018 manufacture date. It has the 3 piece wrap-around "window" guard.
Las Vegas AS Salesman said it was standard last half of 2018 and going forward.
I like the protection aspect of the 3 piece guard, however like the look of the added exposed aluminum if without. I'd assume making it standard allows AS to use the same front pieces as 30rb models.
This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.