Tohachi,
Yea, I had a FF. Real similar but as Yvsa would say the Sgt Karka is "more oval shaped" Also the fit and finish is more top notch.
Bruise, what do you mean by rivets on the sheath? Also where are the nails at. I was trying to find them on mine but I don't see them right off. The sheath on this one rides higher and more closely to the body than my others.
I have to say that as far as quality of manufacture, this is probably the best one I have owned. The handle is beautiful and the finish is awesome. It is even rounded ever so slighly right before the butt cap to prevent damage to your hand. The bolster (see the pics) is the smallest and most traditional I have.
I went on a hike last night and I worked some on this huge pine that went down over the trail and is super dry. It was slow going cause the wood was so tough, but it cut well. I'll probably cut it completely tonight and will try to take a pic but the edge holding is awesome.