Month: March 2024

Knife Review: Extrema Ratio FRAME ROCK XXV Anniversarium

31 March, 2024

Extrema Ratio have been celebrating their 25th Anniversary in style with a number of limited runs of new and old models.

In this review we are looking at the XXV Anniversarium Limited Edition of the overbuilt folder, the FRAME ROCK. If you do miss out on the limited edition, most of the content here is perfectly valid for the standard FRAME ROCK, so limited or standard, you can get one of these ROCK solid folders.

This review of the Extrema Ratio FRAME ROCK includes an in depth video with overview and detailed measurements, plus image galleries and more.

Review Videos

Starting with a short format sixty second review:

Onto a full video review covering many more details:

What’s in the box?:
Included with the Anniversarium Limited Edition, is a special numbered presentation case and Anniversarium challenge coin. In this section, instead of unboxing we are looking at that special presentation case.

The Anniversary Coin:
Before we move on, here are both sides of the Anniversarium challenge coin.

A REALLY good look round the FRAME ROCK – Things to look out for here are:
Unprecedented in size, this gallery contains more photos of details than ever before, to take in as much of this special edition as possible.
Folded or not, the FRAME ROCK is unmistakably Extrema Ratio with its grip pattern. The FRAME ROCK has presence even though it is relatively compact. On the plain head of the pivot bolt there is an engraving of the anniversary logo with a further XXV Anniversarium engraving just above this. Immediately you can see the 6mm thick blade stock with heavy jimping. An integral lock, the FRAME ROCK has a steel insert on the end of the lock bar to increase lock life and it can be replaced if needed.
Extrema Ratio folders use a pivot bolt with locking screw that prevents loosening. Unusually, the deep carry clip wraps completely over the end of the handle, fixed onto the opposite side’s handle. As it wraps over it has a slot to allow the glass breaker to protrude through the clip (this can be fitted on the opposite side).
Waisted spacers hold the handles in place, and give the FRAME ROCK its open back layout.
As the glass breaker is fixed in the solid handle (not the lock bar side), to accommodate this, should you swap the clip side, there is an extra slot in the clip.
Looking right into the pivot, what is visible are the ball bearing cups for the pivot bearings that give the blade a smooth action.

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 N690 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?

A compact, heavyweight, overbuilt knife, it almost seems a contradiction, but the compact size actually allows for a relatively light weight for such a robust knife.
Featuring a beautiful spearpoint blade with fuller, using the same blade shape as the Contact and Contact C fixed blade models. The blade shape adds to the unique look the FRAME ROCK brings.
The more you handle it, the more you understand the allure of the unusual robustness for a knife of this size. Typically, overbuilt folders are much larger, but the FRAME ROCK fits within the hand, while having an incredible solidity – hugely satisfying.
Somehow it also belies belief that such a wide spearpoint could fit into the handle, looking all the more impressive as you swing it open.

For larger hands, the compact handle does mean the clip tends to dig in if you are working the FRAME ROCK hard, and in the left hand, the glass breaker can dig into your hand when taking a tight grip. But trade this off against the overbuilt strength you are carrying, a blade that will take on heavy tasks and not break a sweat.

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
_______________________________________________
Glass breaker digs into hand when used left-handed.
Thick blade reduces slicing ability.

_______________________________________________
Things I like
_______________________________________________
Incredible robustness for its size.
Stunning spearpoint blade with fuller.
Deep-carry ambidextrous clip.
Replaceable steel lock bar insert.
Pivot-bolt locking-screw to prevent loosening.
Smooth ball-bearing blade pivot.
Thick Titanium frame.
Special numbered presentation case.
Anniversarium challenge coin.

 
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Gear Review: Nitecore EMR05 EMR06

25 March, 2024

This detailed review of the Nitecore EMR05 and EMR06 portable mosquito repellers, includes all aspects of their performance and function.

The EMR05 and EMR06 are two new devices from Nitecore giving you ultra-portable insect repellers with the lowest weight-cost possible.

The EMR06 has a built-in battery, so is self-powered, and the EMR05 is smaller still, as it needs external power from a power bank.

If, like me, you protect everyone else from mosquito bites, by being the one the mosquitoes make a beeline for, then you may be as pleased as I am to find the new Nitecore EMR05 and EMR06 portable insect repeller devices.

Making his second appearance below is “Stoppo”, Tactical Reviews’ “don’t do that” guardian. Mosquitos beware, armed with the EMR units Stoppo says NO!

With the EMR05 and EMR06 bringing you ultra-portable versions of insect repellers, you can see just how much smaller they are compared to the EMR10 and EMR20.

Review Videos

Starting with a short format sixty second review:

Onto a full video review covering many more details:

A few more details:

What’s in the box?:
Both the EMR05 and EMR06 are covered here. Each has a USB-C cable, wrist lanyard, and some repellent mats.

A good look round the EMR05 – Things to look out for here are:
The EMR05 is keeping things to the bare minimum. A power switch with indicator light, the slot for the repellent mat, USB-C port for power and a mounting system. Nitecore’s MOLLE mount system is really neat and effective.

A good look round the EMR06 – Things to look out for here are:
The EMR06 introduces a built-in battery while otherwise similarly keeping things to the bare minimum. A power switch, indicator light, the slot for the repellent mat, USB-C port for charging and a mounting system. Nitecore’s MOLLE mount system is the same here, so you can see the increased size of the EMR06, yet it is still very compact.

Technical Testing:
Both EMR units were setup with a modified repellent mat that held a thermocouple probe under it and positioned over the heating plate. This logged the temperature during the run.

Some notes on the graphs:
The EMR06 was logged first, then the EMR05. About halfway through the EMR06 measurement, my thermocouple data logger started to include a lot of noise from the optical USB PC link. When no logging was taking place the readings were consistent, but as soon as the logging was turned on the readings showed noise. So the second half of the EMR06 trace has noise, but if you ignore the noise on the trace you can see the underlying trend of temperature variation during the run. The behaviour of the EMR06 did change throughout the run.
For the EMR05, the noise is present for the entire run, but you can still clearly see a different temperature control profile to the EMR06.
Remember that the EMR05’s runtime depends on the input power source, so here is just stopped as there was enough run to see its behaviour.

In the second graph the view is zoomed in for the first 30 minutes of the run to show the temperature control profile of each unit better.

Also included in the section are the measurements of the operating current for the EMR05, and the charging current for the EMR06. The EMR05 is shown during the temperature logging measurements while drawing power from a Nitecore power bank, and with the thermocouple in place.

What it is like to use?

Compared to the previously reviewed EMR10 and EMR20, these two units are so small and light, why wouldn’t you carry them? Clipped to your bag, you don’t even notice you are carrying them.

Nitecore make and supply double size repellent mats. This is clearly the easiest way to load up the EMR05 and EMR06. It is possible to use two standard size mats instead giving you more flexibility.

The EMR05 needs a power bank to run from. It is highly likely you would be carrying you power bank of choice anyway, for charging various items, so with the EMR05, you can just run this from any power bank you happen to have, or a plug-in charger if you are in a hotel. I’m carrying the Nitecore SCL10 power bank as it is (amazingly) also a superb video light.

I’ve been using both the EMR05 and EMR06 in a variety of indoor and outdoor locations carried separately or clipped onto a bag.

So how did they do?

Firstly, with me being apparently the finest of dining for mosquitos, if they are determined enough, you will still get bitten; I did. I’ve been bitten when covered in deet, so using repellent mats outdoors might deter some, but is not absolute protection.

It is not at all possible to properly measure the effectiveness of these repellers as the number of bites will also depend on the time, temperature, and hatching of the insects, so this can be impressions only.

Assuming the mats themselves are effective, I have been aware of the aroma coming from the mats. Considering this is outdoors, that is reassuring. Effectiveness is so subject to wind direction and strength, so you might not actually have any cover of the repellent and insects might reach you undeterred.

NOTES on the repellent mats:

There are a few different active ingredients used in repellent mats, and these are also frequently in combination with Piperonyl butoxide. Prallethrin, Transfluthrin and D-Allethrin are the most common with Nitecore’s MRM10 Mosquito Repellent Mats using Prallethrin.

Piperonyl butoxide (PBO) is a man-made pesticide synergist. By itself, PBO is not designed to harm insects. Instead, it works with bug killers to increase their effectiveness. PBO is often combined with natural pyrethrins or man-made pyrethroids. It has been used in pesticide products since the 1950s, when it was first registered in the United States.

A repellent mat needs to be changed when it turns white. You can use Repellent Mats for a shorter period of time than the manufacture specifies and they will still be just as effective. However, if there is going to be several days between usages, you might want to keep the mats in their foil packaging or in a sealed plastic bag between uses.

Just like I wanted with the larger EMR10 and EMR20, the one feature I wish they both had was an auto-off timer. Once you turn on either one of them, they will run until the battery (or power bank) is flat or you turn it off. I found that treating at critical times was more important than all night and I would have preferred to be able to fall sleep with the repeller turning itself off after an hour or two and leaving power to run on another night.

While using the EMR05 and EMR06 I have been bitten. I am convinced I would have been bitten more without them. The most difficult aspect of their use is the protection zone they can provide. If you are walking, then the repellent vapour is trailing after you and not surrounding you. If there is wind, the repellent is blown away. In instances where you are not moving and there is wind, you need to put the device a few meters away from you and up-wind.

Some of the better results are for smaller or enclosed areas. Treating a tent, or a hammock net are idea uses. While on holiday, using it in a hotel or guest room works well.

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 that covered in the review.

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.

I’m trying something slightly different and starting with what doesn’t work so well, so I can finish on a more positive note.

_______________________________________________
What doesn’t work so well for me
_______________________________________________
No auto-off timer.

_______________________________________________
Things I like
_______________________________________________
Ultra-Portable compact outdoor insect repellent devices!
Double size repellent mats (and able to take two standard mats).
Versatile MOLLE mount system.
USB-C ports on both.
EMR05 can run from any power bank.
EMR06 can run/charge from any power bank.
EMR06 has a small built-in battery allowing 3 hours independent use.

 
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Knife Review: ANV M311 COMPACT

17 March, 2024

The M311 COMPACT is a scaled down version of the excellent M311 Spelter. The reduction is 13%, bringing the overall length down to 235mm and blade to 110mm, while completely retaining the M311’s distinctive characteristics.

With the M311 Spelter being one of my favourite knives, the announcement of the M311 COMPACT had me sitting on the edge of my seat waiting to get hold of one and try it out.

Join me in this detailed review of the ANV – ACTA NON VERBA Knives M311 COMPACT to see what it is really like.

Before we properly embark upon the full review of the M311 COMPACT, lets see what that 13% scaling down looks like compared directly to the original M311 Spelter.

Including the sheaths initially as this is the package you carry.

Then the knives themselves next to each other. 13% doesn’t sound much, but it makes a big difference. The original M311 Spelter is a substantial knife. With a 13% reduction, the M311 COMPACT becomes much more EDC than expedition.

Review Videos

Starting with a short format sixty second review:

Onto a full video review covering many more details:

A few more details:

What’s in the box?:
The ANV packaging has had a slight update where the knife is held in a liner which stretches a clear plastic film over the knife to keep it firmly in place.

A good look round the M311 COMPACT’s Sheath – Things to look out for here are:
With the scaling down, all the parts ANV make are reduced, but the MOLLE straps are not, so become relatively more prominent features. Looking beyond these, we have a Kydex sheath with hollow rivets holding it together. A generous free running drainage hole at the tip of the sheath ensures easy flushing if needed, and the number of hollow rivets and slots give you lots of attachment points.

A good look round the M311 COMPACT – Things to look out for here are:
ANV’s distinctive swedged blade never disappoints on the looks front, giving it immediate appeal. It may be scaled down, but all the proportions and details are still spot on.
3D milled scales, finger guard and first-finger groove, all provide excellent grip, and then there are also three sections of jimping in the full tang. The M311 has a shaped thumb rest on the blade spine to allow for powerful cut control and pressure to be applied directly behind the edge.

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 Elmax 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?

Local laws may or may not allow a fixed blade to be carried as an EDC. Unfortunately where I live you need ‘good reason’ to carry a fixed blade in a public place, however on private property and when I do have good reason, my preference is for a compact fixed blade. The M311 COMPACT has muscled its way into my top carry spot, the closest a fixed blade can be to being my EDC.

Take a look at it in the hand. (I take XL size gloves.) It is not small, but it is also not a large knife, instead finding a really efficient and effective sizing that gives you great cutting power without great size.
Multiple grip placements allow you to find the one that gives you the best advantage for any task.

Though the M311 COMPACT is a scaled down M311 Spelter, one observation I have is that oddly it feels ‘crisper’ in terms of its handle finish, and this makes it a little more abrasive to hold and use. Excellent grip, but oddly a touch more fatiguing to use purely from the roughness of the handle. This is a ‘feel’ more than anything really tangible, and for the tasks I tend to use it for, not a problem at all.

Wanting to be carried, the M311 COMPACT has made itself a go-to blade, patching up some air conditioning ducting, trimming down a mouth guard, and splitting up pallet wood are only some of the varied jobs it demanded to be used for.

As I mentioned earlier, with the smaller scale M311, the MOLLE straps became larger, and I decided to drop these in favour of (at the moment) a single Ulti-Clip. The bare sheath allows the M311 COMPACT to slip easily into a pocket or bag, and adding an Ulti-Clip for pocket carry then makes it so easy to pick up the knife and re-sheathe over and over.

If you look at the position of the Ulti-Clip, this was settled on after trying several positions. Deeper carry makes the re-sheathing more difficult, with the finger guard often catching on the pocket edge. If the clip is fitted to the other side, the sheath twists away as you re-sheathe it, so this was the position that worked best for me. If you needed more stability, a second Ulti-Clip would lock it in place; this is just a personal preference.

Local law allowing I would carry this knife much more, I do however carry it as much as a possibly can. EDC or backup blade the M311 COMPACT demands to be picked up and used.

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
_______________________________________________
The handle finish is a little too ‘crisp’ and abrasive.
MOLLE straps seem oversized.

_______________________________________________
Things I like
_______________________________________________
Everything else!
Ideal size for general utility and EDC.
Elmax steel.
Excellent grip.
Slim blade slices well.
Blade thick enough to be very strong.
Easy to fit different mounts to the sheath.
Light enough to forget you are carrying it.
Excellent handling.

 
Discussing the Review:
Something new – will it work? A Tactical Reviews Subreddit.
TacticalReviewsChat on Reddit
Please visit there and start/join the conversation.