yeah thats the microtech jagdkommando, three sided twisting dagger, runs over a grand.
http://www.youtube.com/watch?v=nO29DqHva8w

the knife screws into the sheath for whatever reason, so you can only use it for a decorative piece and not for actual defense, as you would have to unscrew the knife first (assuming you carry it in its sheath)

Who would put a beautiful thing like that in a sheath? well there's always someone but still. BTW good research I didn't research it cause I was running on a mountain dew, 2 hours of sleep and I only ate a spinach salad with a small serving of crab at school. so yeah I was just going to detail the weapon in the story but I said "What a drag." found the picture from my imagination and posted it.

P.S.- sorry for the inconvenience of my drowning you in this book of a message I do it alot.

Second most expensive tent stake on earth, I think. Just TRY sharpening that sucker. lol