I was just about to request this! Lol
And yeah it is in active service. There are currently 4 in existence. The CH-53D exists too and is used by the USMC. The same branch will use the CH-53K King Stallion.
Anyway since this has been requested if it's okay I'd like to amend it and suggest a package or individual files dedicated the branches of service.
https://www.militaryfactory.com/aircraf ... aft_id=863