Quote History Quoted:
While the 6 is better for batoning wood and doing some other tasks that require a large knife. It's length and weight is It's drawback of being a great knife.
The 4 is better suited for doing just about everything that a knife is needed to do. Being smaller and lighter makes it better for being used as a fighting knife all the way to a great bush knife.
Of the 2, most people would take the 4 over the 6 as it would suit them better. I would take both, put the 6 in a pack for when it's needed and keep the 4 on a belt or strap on web gear.
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My views on knife sizes have changed over the years, mainly due to deployments and a lot of field use. I won't get rid of them, but most of my knives with blades over 5.5" to about 7.5" are pretty much left in the drawer. I've just found the overall length of those blades doesn't work for me if carried on my person or kit; they simply are too cumbersome without a specialized carry method. Having spent a lot of time in theaters where there was a lot of traveling in vehicles/helos/fixed wings and navigating buildings more than open fields, longer blades just got hung up and in the way too often.
While I can carry up to most of my fixed blades with 5.5" blades relatively easy on my belt or kit, I've found the sweet spot with blades in between 3.5-4" will do 70% of my field cutting tasks.
I actually now carry a small folding saw do fill in some of the duties most would expect of a larger blade for chopping such as an ESEE 6; I've found saws far more efficient than a mid-sized fixed blade for those typical, light chopping tasks.
I still like and will carry a larger fixed blade (8-12" blades/machetes/axes, etc.), but will often leave them attached to or inside my pack for more serious work. Those mid-sized fixed blades that try to do everything from cutting to chopping to hammering end up not doing anything very efficiently and just add unnecessary weight to my first/second-line kit. I do have some "tank" blades in that 5.5" range that would be more optimum for me, but there are very few that can carry well, cut well, and don't weight like most 1/4" slabs of steel. I will grant that the ESEE 6 is borderline for me as a belt-blade, but ESEE does do a good job of giving it a full-flat grind to reduce weight (unlike their ESEE 5 monster).
ROCK6