In reply to the post above I got this:
Iryll@htx.com wrote:Just sent out the pictures of the M-9 I have. It was told to me that it is a factory upgrade, that was tested for Seal team and EOD use, as a diving knife not a Bayonet. It was later scrapped by the factory. My guess was when the military decided on the replacement for the Kaybar, that cheap black plastic knife the Navy decided upon.
The pictures are of the diving knife I used for half of my diving career.
Here are Iryll's pics:
As an aside, I do know that Phrobis made a dive version of the M-9 and I need to look through the huge assortment of files that I have saved over the years to find the photos... If I can find them I will post pics here for a comparision but I do not believe the dive knives used this style sheath and the handle was different as well...