The Rukus 610 would be right up your alley. The blade is a bit more than 4 inches. Soild as a rock, but with a blade geometry that is actually useful. The big, heavy blade snaps into place and locks up tight. And yet, if you polish the washers and adjust everything right, the blade will swing freely like a pendulum when you hold the Axis lock back.
It carries better than the Cold Steel 4 Max. The Military is thinner, but the blade is more fragile for actual use. The Rukus has a handle you can actually hold easily and use without fatigue.
It's a discontinued knife, but you can find them in excellent condition once in a while on this forum for about $300. They tend to be more expensive on Ebay, but you can still find deals there if you're patient.
It's a hall of fame knife. That one below has a custom reblade of A8(mod) by Josh at REK and custom heat treated by Fredrik Haakonsen, which is pretty much the toughest steel around.
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