Also FYI, SEAL Team 5 bought at a couple of tanto bladed Buck Knives; specifically, the Model 187 - Intrepid.
The Buckmaster wasn't strictly an in house Buck design now was it?
-http://www.usmilitaryknives.com/porters_page_23.htm
As for the Buck Nighthawk, there were 3 prototypes with different blade styling and material varients (notably the Buck ST/ ST0/ST5) which were part of the original circa 1991 US Navy SEAL Knife evaluation, in which SOG Knives had openly declared to have won...
-http://www.maddogknives.net/c_ataktest.htm
-http://www.missionknives.com/articles/index.html
"speedtrip", a fighter or fighting knife is by definition, a blade styled for a human predator in context of a human vs human stand off.
That's why it's termed as a "fighter".
In order to meet this classification it must have some offensive specifications built into its design.
It may or may not be a dagger but normally appears to be spear pointed or at least have a false edge which is prefebly sharpened. It could also have a "skull crusher" pommel. Some have knuckle dusters/finger guards or are subhilted for only one type of grip.
But more importantly, to be an effective fighter, it must have a blade length long enough for "reach".
The whole idea of fighting with a knife is closely linked with the type of bladed fighting art in which the knife user is skilled in.
Asian knife fighting is more favoured in this day and age.
And in this respect some knives used in these arts is fairly small.
Take for instance the malay world's filipino balisong/butterfly knife or Indonesian Karambit.
What you have indicated would fall into the category of a modern fighting knife hybrid and not a typical fighter in the classical european flavour.
I would however, narrow it down to credible cutlery concerns which have the known distinction of making edge weapons rather than just knives that could be used as weapons - take for instance the infamous Cold Steel Knives for one (and they have factory seconds on offer too!).
Their products boast quite an remarkable list of blade patterns to suit every form of blade use/style and especially for those who train in direct preperation for offensive situations. It really doesn't take too much imagination to find a personal favorite. At the very least, there's the much mentioned legendary Ka-Bar and it newer shorties and such, Good luck in your search.
