Knife Review: Spartan Blades Soter

In this detailed review of the Spartan Blades Soter find out why this knife might just be your EDC saviour and favourite daily companion. Join me in this Spartan Blades Soter Review for all the details.

Named after Soter, the Greek “protector” and provider of salvation, the Spartan Blades Soter Folding Knife, designed by Curtis Iovito, uses Spartan Blades exclusive RaceLock. The RaceLock is a spine-mounted locking mechanism engineered for fast, smooth, one-handed deployment and a rock-solid lockup, providing safety and reliability when you need it most.

Soter is designed for everyday carry, readiness, and utility, the Soter features a 3.25-inch CPM S35VN steel harpoon point blade, delivering the reliability and performance you expect from Spartan Blades.

What’s in the box?:
A simple presentation with a cardboard box, and inside, the knife with a sticker in a bubble wrap bag.


A good look round the folded Soter – Things to look out for here are:
Starting with the Soter folded, there is a lot to see. This is the Carbon Fibre version of the Soter, and unusually the main flats on the handles have been left with the semi-gloss top layer giving the handles a sheen that contrasts with the machined, bevelled and shaped edges. Even folded, the pronounced hump at the thumb studs and visible swedge hint at the purposeful blade shape lurking within. Almost steampunk style, the RaceLock immediately adds interest. Distinctively Spartan Blades, the monolithic pocket clip is machined from a solid piece and fitted with concealed screws. A matching blanking plate covers the mounting point if you swap the side the clip is fitted (but you would need to take the knife apart to do this). The pivot bolts, handle screws, pocket clip, thumb studs and RaceLock lever are all in a matching finish.
Slim steel liners provide support just around the RaceLock mechanism, but are kept to a minimum.


A good look round the open Soter – Things to look out for here are:
Opening the blade you can watch the RaceLock coil spring compress as the lock pin slides through its guide block; at the same time the lock button moves backwards. With the blade fully open and the lock engaged, the spring can bee seen fully extended again.
Now, with the blade open, we see the ergonomic sweep of the handle towards the narrow harpoon-point blade. Just behind the thumb stud hump, there is jimping in both the blade and handle giving you the ability to exert significant forward pressure.
Even without the logo, the blade shape has to be a Spartan Blades blade; slim, pointy, with harpoon point, and the very matt finish. A large radius sharpening choil full exposes the heel of the cutting edge for sharpening, but also reduces the chance of hanging-up on deep cuts.


The Blade and Handle – Detailed Measurements:
For full details of the tests and measurements carried out and an explanation of the results, see the page – Knife Technical Testing – How It’s Done.

The blade is made from S35VN steel.


The Factory edge up close:

Followers of Tactical Reviews will know my views on factory edges, but to recap:

Anyone using a knife will need to sharpen it. That first factory edge is just like the first tank of fuel that a new car comes with (or first charge of the battery).
A good factory edge is a ‘nice to have’ but not a ‘make or break’ for a good knife, as you will be putting your own edge onto it soon enough.
The factory edge does however indicate the care a knife maker has put into the final finish.
It is for this reason Tactical Reviews measures factory edge sharpness and specifications, and includes this information in the detailed technical testing.

As a further look at the factory edge, this section has been added to include some high magnification photos of the factory edges.

This edge is a 52 degree inclusive and average BESS of 250, but actually cuts much much better than those numbers would suggest. I was going to re-profile to 17.5 DPS but found I didn’t have to. A nice eager edge.


Spartan Blades Soter Review – What is it like to use?
Before I even took this knife out of the box, Spartan Blades were in touch about the smallest first production run issue I’ve come across. Amazing customer service offering to replace / refund the knife. And that first production run issue?; it was if you slammed the blade shut, the cutting edge might contact a small screw in the RaceLock. I’ve come across plenty of knives that the cutting edge can knock inside the handle, and never before an offer from the maker to rectify. Spartan Blades proving how honourable they are and how important it is to them to get it 100% right for their customers.
I did not want to take up this offer, and in normal use I’ve not encountered this potential issue, but I’d like to thank Spartan Blades for their honesty and immediate offer of action.

Compared to other Spartan Blades folders I’ve handled and used, the Soter is a much slimmer knife, both folded and open. The curve of the handle encloses most of the blade making it nicely compact while still having a very useful length of blade and handle.

In my XL glove size hands, the handle is plenty long enough, and the thumb stud hump on the blade provides a very comfortable thumb ramp for powerful forward pressure. I’ll admit I love a harpoon blade, so the Soter scores many style points for me on that, and the dip in the blade spine that creates the high harpoon shape, happens to give you the ideal position to put your thumb to apply pressure directly behind the cutting edge. The last couple of photos are for a two handed close, with my thumb being used to unlock the blade; this style requires the other hand to close the blade as otherwise you would be swinging the blade into your fingers. One-handed-close is easy with a different grip to keep the blade path clear, and using your first finger to pull back the RaceLock button.


I’m in two minds about the pocket clip. I really like the fact it is machined from a single piece and has concealed screws; this looks really refined and strong. But those concealed screws mean to swap sides is a major job as you have to disassemble the entire knife to access those screws. I’ve also found the clip a bit stiff and harsh with the contact point a bit sharp. That in itself is both a pro and con as it will stay put on your pocket, but be harder to put on and off.

While testing I never seemed to have my camera with me so the variety of jobs it took in its stride is not represented here, but in all cases that eager factory edge breezed through everything with ease.

This carbon fibre version is unusual with the flats of the handle left in the semi-gloss stock finish. As the light reflects from this is gives and interesting two-tone effect, and combines well with the slightly stiff pocket clip, as any other texture might drag too much under the clip.

Of all locks of this type I’ve used, Spartan Blades RaceLock has the most comfortable lock buttons to operate, and I like that steampunk styling with the visible spring and guide rod. Purposeful and full of Spartan Blades spirit, the Soter will certainly look after you.


Spartan Blades Soter Review Summary

The views expressed in this summary table are from the point of view of the reviewer’s personal use. I am not a member of the armed forces and cannot comment on its use beyond a cutting tool or field/hunting knife.

Something that might be a ‘pro’ for one user can be a ‘con’ for another, so the comments are categorised based on my requirements. You should consider all points and if they could be beneficial to you.

_______________________________________________
What doesn’t work so well for me
_______________________________________________

Stiff pocket clip.
Full disassembly needed to swap pocket clip to left handed.
I’d prefer a deep carry pocket clip.
Thumbstuds are slightly long and sharp.

_______________________________________________
Things I like
_______________________________________________

The RaceLock’s steampunk styling.
Very comfortable lock release button.
Narrow harpoon blade.
Excellent thumb ramp.
Very secure pocket clip.
Multiple grip positions for power cuts.
Effective grip provided by handle profiling.
Super smooth operation.
Fully unified and matching hardware.
Excellent fit and finish.
Spartan Blades customer service.

Spartan Blades Soter Review Videos

Starting with a short format sixty second review:


Onto a full video review covering many more details:


 
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Knife Review: Spartan Blades USMC KA-BAR

Take a classic knife, let Spartan Blades perform their magic on it, including using MagnaCut for the blade steel, and you have the Ultimate Elite Edition USMC KA-BAR! This is a detailed Review of the Spartan Blades USMC KA-BAR made with CPM MagnaCut steel.

In this feature review we are looking at the PVD – Tungsten DLC (Flat Black) blade coating with similarly coated butt cap and guard, plus the black leather sheath. The Spartan Blades Elite USMC KA-BAR is also available in ZrN (Flat Dark Earth) and with black or coyote Kydex sheath.

I first saw this awesome knife at IWA 2023, and could not wait to get hold of one.

Review Videos

Starting with a short format sixty second review:


Onto a full video review covering many more details:


What’s in the box?:
Just to point out that the challenge coins and mini patch shown with the box here are not included as standard, but are extras you can order as well if you would like to.

You can see on the box that the USMC KA-BAR is part of the Spartan Blades Elite Grade range – top performance in every way.


A good look round the leather sheath – Things to look out for here are:
The black leather sheath is one of three sheath options. It is a traditional layout and construction, stitched and riveted, and made from high quality leather.
Very nicely embossed into the front is the Spartan Blades logo, along with KA-BAR trademark.
The retention strap is located near the butt, again following a traditional pattern of sheath design.


A good look round the knife – Things to look out for here are:
Unmistakable clip point blade with sabre grind and long fuller, all in a black finish. Deeply Laser engraved next to the guard is the large KA-BAR branding and tiny version of the Spartan Blades logo – plus that magic word MagnaCut. This KA-BAR has a straight, asymmetrical guard, and you can also see the rounded plunge line. For this Spartan Blades Elite version, the handle is Kraton G which is super durable polymer.
The butt cap is held in place with a interference fit pin that passes through the end of the tang. When looking at the knife tip close up, this shows the factory edge, matt/flat finish and the little flecks are from the leather sheath.


The Blade and Handle – Detailed Measurements:
For full details of the tests and measurements carried out and an explanation of the results, see the page – Knife Technical Testing – How It’s Done.

The blade is made from CPM MagnaCut steel.


The Factory edge up close:

Followers of Tactical Reviews will know my views on factory edges, but to recap:

Anyone using a knife will need to sharpen it. That first factory edge is just like the first tank of fuel that a new car comes with (or first charge of the battery).
A good factory edge is a ‘nice to have’ but not a ‘make or break’ for a good knife, as you will be putting your own edge onto it soon enough.
The factory edge does however indicate the care a knife maker has put into the final finish.
It is for this reason Tactical Reviews measures factory edge sharpness and specifications, and includes this information in the detailed technical testing.

As a further look at the factory edge, this section has been added to include some high magnification photos of the factory edges.


What is it like to use?

This is a knife design that has been in active service since 1942. Clearly a tried and tested design.

Before going into more about the Spartan KA-BAR, I wanted to pause a moment to look at a couple of other Spartan Blades Elite knives.

Spartan Blades, as well as producing their own fantastic designs, have brought at least one other all time classic back to life and up to date. Here is the Harsey Model II (original design), EK Commando knife (classic), as well as the latest KA-BAR.

And back to the subject of this review – the KA-BAR and how it handles. Shown here is a gallery of the knife in hand. I take XL size gloves.

Comfort and stability is excellent with the Kraton G polymer handle. Molded to represent the original stacked leather handle, but without any of the fragility or other issues a leather handle has. This material also provides excellent shock absorbency if batoning or striking with the blade.

The asymmetrical guard allows for the thumb to reach over easily and press down on the spine. It is a mid sized fixed blade and handles well for this class of knife.


In this final gallery, the first four images represent a cutting test carried out with the factory edge, and a 1″ manila hemp rope. It is a test I slightly regretted starting as the specially prepared rope turned out to be exceedingly tough to cut. I’ll explain why…

Rope cutting tests for me have always had a few flaws and the biggest of these being lacking consistency and being very wasteful, so I went and added my own twist. To overcome those issues, I tightly wrapped clean, new, rope in a brown paper strip with a water soluble gummed back. This was then allowed to dry and kept indoors to keep it fully dry.

The idea was to stabilise the fibres so each cut would be the same (instead of the rope structure collapsing and spreading), while at the same time allowing a thinner ‘slice’ of rope to be cut each time.

Well, unfortunately this was so stable, the rope was almost like a wooden dowel when trying to cut it, with virtually no give or flexibility. Because of this, each cut was very hard work and fatiguing.

Shown is the starting sharpness measurement (BESS 275g), some of the cuts and rope fibres, then the sharpness after 16 cuts (BESS 406). At this point I had to stop. The sharpness had dropped, but was still cutting well enough, and if I could have carried on, so could the knife thought the cuts were less clean.

One of the things I love when carrying this knife is that I have a classic design, but in the very latest materials. A proven design, but tougher and more reliable than ever. Truly an ‘Elite Grade’ knife from Spartan Blades.


Review Summary

The views expressed in this summary table are from the point of view of the reviewer’s personal use. I am not a member of the armed forces and cannot comment on its use beyond a cutting tool or field/hunting knife.

Something that might be a ‘pro’ for one user can be a ‘con’ for another, so the comments are categorised based on my requirements. You should consider all points and if they could be beneficial to you.

_______________________________________________
What doesn’t work so well for me
_______________________________________________

Being very picky – the laser engraving has ‘catchy’ raised edges.
The above point is very very picky!
Nothing else.

_______________________________________________
Things I like
_______________________________________________

Spartan Blades build quality.
CPM MagnaCut Steel.
Classic time-tested design.
Choice of leather or Kydex sheaths.
Kraton G handle material.
Hardwearing PVD flat/matt blade coating.