Primary role for 5 to 6 inch fixed blades

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Nov 7, 2011
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What's the primary role for 5 to 6 inch fixed blades in your knife usage? What tasks are knives in this size class especially good at?

Here is what developed for me: I use many of my fixed blades in the small and large categories, all the time. I rarely use any knife in this sort of medium 5 to 6 inch class anymore. In fact I've thinned mine out and the only one I have left--the Swamp Rat Ratmandu pictured below--sits at home and I never use it. Why? Because my smaller 3.5 to 4.5" fixed blade knives are easier to carry, let me do detail work easier, and do 95% of everything this knife can do. And if I know I want to do any real wood chopping or splitting, brush clearing, etc., my larger knives and machetes are far more efficient than any knife I've ever owned in this size class.

Bottom line: for my usage, knives in this class are not super useful. Not saying nobody should own one, just that I don't find them super useful. They're not great at small knife tasks, and they're also inadequate for large knife tasks. Anybody who's tried chopping through a 4" to 5" log with a knife like the one below, versus say a 10" Busse, a BK9, an ESEE Junglas, or a small hatchet, knows what I'm talking about. I'm not constrained by any sort of survivalist fantasy ("What if you could only bring one?"). I ALWAYS bring more than one :D and would even if I were hoofing it during some natural disaster.

Just wondering --beyond special cases like combat soldiers who can only afford to carry one knife because of their heavy load-out, or putting a single knife in a bug-out bag for similar reasons--what's the compelling case for knives in this size class.

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Nice Ratmandu.
For me the size you're referring to is a jack of all trades, master of none size as you describe.

If you told me I could only have 1 knife for all time, it would be a 5-7" fixed. I've always had a knife of this size in my truck.
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What he said ^^^^^

It doesn't baton, feather, or slice (rope of food) well, but it can.
 
I would agree with you guys. Perfect for no certain task, but good/great for all. Jack of all trades for sure.
 
So this confirms what I was thinking, and it boils down to: utility knife that has enough length and mass to handle LIGHT wood processing work (batoning and chopping). With an emphasis on LIGHT.

So in the civilian sector, I see this kind of knife useful in two cases:
  • Bug-out bag. When you have limited space/weight. It gives you a utility knife big enough to split wood when necessary.
  • Person who's not a big knife collector and simply wants to own one do-it-all utility knife that can "kind of" cover every task of a 4" to 10" knife. I have friends like this, not big knife guys, they'd buy an ESEE 6 if I told them to, and that'd be the only knife they'd own besides their folder for back packing.
 
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Here's my blade length preferences from experience.
Up to 3", 4-5", 10-11", and 17"+
Everything else just sits and is eventually given away.
 
Another reason I'm such a fan of this size knife is that I used a Kabar USMC almost exclusively for 30 yrs.

Wish I had a pic of it for old times sake. Gifted it to my nephew before joining BF.
 
I use mine to make a fire. Make wood shaving, baton small pieces for kindling.
 
This size is often used in " what if ? " knives . A easy carry , all purpose emergency / survival tool . Commonly overbuilt and too thick for ideal slicing because you MIGHT someday need it as a pry bar or some other ill-defined hard use . Of course , can also be used to fight bad guys or bears ( Oh My ! ) . Ends up not being very good at anything . Maybe 3V or some other super steel will make this kind of knife more slice worthy while retaining enough toughness ?
 
Of all my fixed blades, I only have two in the 5-6" range. I rarely find reason to carry them in leu of my many 3-4" blades, even for bushcraft. I also don't do much chopping with my blades. I stick to sven saws for chewing through lumber in the field.
 
This size is often used in " what if ? " knives . A easy carry , all purpose emergency / survival tool . Commonly overbuilt and too thick for ideal slicing because you MIGHT someday need it as a pry bar or some other ill-defined hard use . Of course , can also be used to fight bad guys or bears ( Oh My ! ) . Ends up not being very good at anything . Maybe 3V or some other super steel will make this kind of knife more slice worthy while retaining enough toughness ?
I guess that's one way to look at lt.

The "slice worthiness" of a knife has more to do with blade geometry than blade length.

For me, 4-5" range is kind of the odd duck.

I agree with Tortuga. I don't do much chopping with knives.
 
Interesting. I spent the last two days in the woods, getting (sorta) ready for hunting season. Fixing and hanging tree stands, clearing shooting lanes, general maintenance. I had a Native LW in my pocket, a Buck Mesa (632?) on my belt and an Estwing hatchet in my pack. The Native never came out of my pocket. The 5" Buck cut brush, removed ivy from a tree and stand, opened a few packages, cut some rope and paracord, and cut a sandwich in half. Oh yeah, and removed an inner door panel from a Jeep. The Estwing took care of anything the Buck shouldn't. It seemed like the perfect knife for the job. Light on the belt, too.
 
For a hunting, camping and general woods knife I am actually quite fond of knives in the 5 to 5.5 inch range. That is kind of a sweet spot for me.

I like fixed blade knives about 3.5 inches, 5-5.5 inches and 9 inches and above.
 
Until this past Friday, the maximum legal length of blade for public carry was 5-1/2". So, when off the farm, I'd carry a 3-1/4" BK11 and a pair of 5-1/4" Kabar 125x knives. Most likely, I'll continue packing the Kabars as I am used to them. I'll pack a larger one on occasion just because. Since I can now.

So, what do I use the Kabars for? Nearly anything.
- cut open boxes and packages
- open feed sacks
- open sacks of mortar mix and cement mix
- cut string, line and rope
- cut seed heads off weeds
- shave down the edges of sheetrock
- cut okra, squash, etc from stalks in the garden
- cut garden hoses, soaker hoses, fuel lines, air hoses for repair
- cut the heads off SMALL rattlers that I happen to step on out in the yard
- clean fish, deer, feral hogs
- making shavings for a fire
- and more

As with anything else, the more you use a mid-sized knife, the more you find you can do with them.

Some people say that knives with 5" blades and larger are "too heavy" or "too big". It's what you get used to carrying. As I routinely carry 7" to 21" blade knives working around the farm, I don't even notice them when I have mid-sized blades on my belt. In fact, I notice smaller 3" to 4" bladed knives more when I have them on my belt than I do the big knives.
 
Perfect size for no perfect task. With a little skill you can use it for just about any and every outdoor task, use it in the kitchen, use it in any utility tasks, etc.
 
A 5 to 6" is what I focus on being an "urban" user. This is the maximum size for me that is capable of fine work and it is this aspect which makes me gravitate towards this size. Cold Steel SRK, Lionsteel M5, ESEE 6, stuff like that. I've had 7" knives. They are not doing it for me I have an Ontario SP-1 which I will let go firesale. I know the 9 or 10 inchers are a sweet spot for batonning but in my part of town at least we aint got no fireplaces, and no "gardners" either.
I have a machete, a 17" Khukri and even a short handled spear for home defense and yard work.
 
Beware that a knife will shrink on you... It did with me. Knives stopped shrinking when I found that 7.5" past the guard is my sweet spot.

Now I'm happy.
 
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