Is it a Desert Jack or a Ratwiler?
I only ask because in his little writeup Unsub mentions the Ratwiler, but never Desert Jack. Also the Mil-dot fellow who suplyed the pictures said, "Our SSM had a beef with the size so some of the boys weren't able to carry them on there person for the full tour." Beef with size would be unlikey with a 11.5" knife, as apposed to the Ratwiler that is 7.5" blade and 13" overall.
If you go to this sight you can see the big differences between the Desert Jack and the Ratwiler.
http://www.swampshack.com/I am not trying to step on toes or argue with anyone, but I am 99.9% sure it is a Ratwiler. And I love that sheath with kydex insert and zippered pouch.