Looks like a Desert Jack to me James but you could be right...it might be a Ratweiler. Ratweiler is a 7.5" blade versus the 6" of the Desert Jack.
I thought it looked more like a Desert Jack because of the size of the sheath next to it.
Assuming all handel pins on Swamp Rats are the same size. look at how much handelspace the pins take up on the Desert Jack vs the Ratwiler.
http://www.swampshack.com/
