Blackjack Knives started in 1987 when Mike Stewart and Steven Lewis set up in Los Angeles importing Chris Reeve's one piece knives, then decided they wanted their own line. The first Blackjack design was the Mamba, drawn by Stewart that same year. Production ran through Seki City in Japan for a stretch before the operation moved to Effingham, Illinois in 1991, and the Effingham knives are the ones collectors still chase. The company folded in 1997. The brand came back, and the knives on this page are handmade in Escanaba, Michigan.
Blackjack built its reputation on convex geometry at a time when nearly everyone else had moved to flat V bevels. There is no shoulder on a convex edge, just a continuous curve from spine to apex, which means more steel behind the cutting edge for chopping and batoning and a shape that strops back to sharp on a loaded leather belt instead of requiring stones and angle guides. Pair that with A2, a tool steel that trades stainlessness for real toughness and takes a screaming edge, and you get a knife built to be used hard rather than admired. A2 will patina. That is the deal you are making.
These are not modern tactical shapes. The Model 7 runs a 7 inch blade at 12.25 inches overall on 0.217 inch stock, hidden tang, with aluminum guard and pommel, in the fighter and hunter lineage that Randall made famous in the mid century. It comes in canvas micarta or stacked leather, with subhilt versions for anyone who wants the extra index point on a big blade. The Model 4 shortens things to a 6.75 inch blade and thinner 0.190 inch stock, which makes it the more practical field knife of the two at just under ten ounces.
Every one ships in a brown leather belt sheath. These are camp, hunting, and general woods knives first, sized for processing game, splitting kindling, and the kind of work that punishes a thin blade. Worth comparing against the rest of our fixed blade knives and hunting knives.