The only Black Jack knife I have is a kinda goofy looking "TacOps" model. I bought it back in 2013 because it was A: on sale cheap, and B: made with D2 steel. The model is still available, but now only in 1095 steel. It turned out to be a pretty good all around knife for the outdoors. Convex, very sharp, and holds an edge.
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Sam......