CPK Encyclopedia

AR-Trvlr · Sep 22, 2019

FK2 - Field Knife 2 / UFK – Utility Field Knife

Nathan the Machinist said:
The handle is very close to the same in profile, but wider in width, however the developed circumference (the size that you feel in your hand) is about the same as the original. This is because the shape is less planer and more rounded. I did this so the knife could be turned in the hand to offer more grip options for field craft work where the original kind of locked in at one angle. I've also tweaked the ass end of it to better accommodate a three finger grip. That plus the relatively long handle gives you some length for a little bit of light chopping (for such a small knife). My goal here is a versatile hand tool. This is why I wanted the prototypes to go to end users with experience with the original. The whole crew here has given it their .02 but I want some user feedback before we go into production.

Specs:
CPM 3V, Delta Heat treat protocol, 61 HRC, .188” thick at ricasso
The edge is sharpened at 18 DPS
Total length 9.75”
Blade length 4.625”
Weight 8.0 oz
Grippy 3D machined scales in micarta or G10
Black oxide treated 18-8 stainless steel fasteners

AR-Trvlr · Sep 22, 2019

UF – 6” Utility Fighter

Specs:
CPM 3V, Delta heat treat, tested 61 HRC, .188" at ricasso
Total length 10.8"
Blade length 6.0"
Edge length 5.6", 20 DPS
Weight 8.0 oz
Extra grippy 3D machined scales
Black oxide treated 18-8 stainless steel fasteners
The price includes a very nice Mashed Cat Kydex sheath with TecLok.

AEBL, heat treat, tested 61 HRC, .175" at ricasso
Total length 10.8"
Blade length 6.0"
Edge length 5.6", 20 DPS
Weight 8.0 oz
Extra grippy 3D machined scales
Black oxide treated 18-8 stainless steel fasteners
The price includes a very nice Mashed Cat Kydex sheath with TecLok.

Uddeholm Elmax stainless steel, tested 60 HRC, .165” at ricasso
Total length 10.8”
Blade length 6.0"
Edge length 5.6”
Weight 7.5 oz
Extra grippy 3D machined scales
Black oxide treated 18-8 stainless steel fasteners
Spec Ops Combat Master sheath

AR-Trvlr · Sep 22, 2019

AR-Trvlr · Sep 22, 2019

Scale Materials

Question re: rubber-insert scales for the choppers produced the following quote from Nathan the Machinist:
First I had to gain about 20 pounds because my old normal ass was too small for the amount of pain-in-the-ass. A full thickness sheet of micarta is skeletonized into a liner with bosses for the fasteners (can't clamp across rubber) and also solid at the front (can't kydex sheath rubber). This is run with the mounting holes complete. A rubber sheet is bonded to a standard liner to make it machinable. This is a sacrificial liner that gets cut away later. It's held down on a vacuum fixture and decked to get down to a clean bondable rubber surface and then machined to fit the skeletonized liner shape. There are hard earned tricks to machining rubber that I'm not going to share on the internet. This machined rubber is bonded to the micarta using an adhesive that ages well, will bond this kind of rubber, and doesn't loose strength with exposure to hand oils and sweat. It goes back onto the fist vacuum fixture (registered with pins) to have the mounting holes reestablished and re-machined. It then goes on to the final machining sculpting steps to be shaped into a handle, done in part with unicorn tears. Then I abuse alcohol and swear never again.

Updated photo of scales per 5/1/2023 post by

Jo the Machinist "Also, typically ALL G10 is buffed and ALL TeroTuf is not. Micarta is grippier not buffed, but perhaps more attractive buffed. "

c63cc171-f87f-4aac-926d-cbd532252bf2-jpeg.1314806

SDFK with Buffed Burlap, Buffed Dbl Black, Buffed Red & Black, Buffed Dbl Red, Ebonite(Buffed?), Natural (Buffed?), Buffed Ecam, Crunchy Ebonite (Buffed?). Photo by @dericdesmond

Discussions:
Pictures of Different Scales in the Wild - https://www.bladeforums.com/threads/cpk-scale-options.1722353/
Antique Edge-Cut Micarta - https://www.bladeforums.com/threads/the-aecm-scales-thread.1723224/
Hard Ebonite - https://www.bladeforums.com/threads/some-thoughts-on-hard-ebonite.1638457/
Field Knife Scales - https://www.bladeforums.com/threads/field-knife-scales.1557944/
Fancy Scales - https://www.bladeforums.com/threads/fancy-scales-thread-a-cpk-picture-show.1627570/
Wood Scales - https://www.bladeforums.com/threads/got-wood.1973341/

AR-Trvlr · Sep 22, 2019

Screws

As of February 2021:

Jo the Machinist said:
We have stainless, black oxide coated, matte Ti, Shiny Ti, and heat blued Ti-not anodized. Except for the swords the stand offs are 1/4" aluminum of varying lengths. The swords are 1/4" steel.

Most knives are made with black oxide treated stainless steel fasteners, but titanium fasteners have been used.

Nathan the Machinist said:
Our titanium screws are allen head now, but they used to be torx.

Nathan the Machinist said:
It is a size 8-32 flat head socket cap screw. It has a 3/32 allen socket, it is a standard 82 degrees, and it is about 5/16" head diameter. This is an ANSI standard machine screw. The ones I use are 18-8 stainless steel with a black oxide coating.

I understand people want to individualize their knives, but functionally there is no real improvement to be made in this screw. They weigh 1.1 gram, so taking weight out of them won't accomplish much, they're already much stronger than the material they're holding down, and the pins take the shear on the scales so the screws are just holding them down. They're not really a potential failure point in my view and I don't see much room for improving them functionally.

Five of six get blue locktite (removable), one of six is short (front, mark side) and gets red locktite.

Nathan the Machinist said:
I have no plans to change the construction to make it easier to take apart. In my opinion the tight pinned scales with fasteners for hold down is very effective, accurate and durable. Ease of disassembly was not a primary design driver, but when I do need to take one apart I feel the amount of effort required to do so is pretty reasonable.

Nathan the Machinist said:
The knives we make can be disassembled, but weren't intended to be. I can get them apart, but we're set up for that.

The hole diameters and pin diameters are tightly controlled and quite snug. There is very little clearance and in fact there is some tolerance overlap where pins can be a light press fit. A lot of folks can't safely deal with that.

The shorts screws found on the signature side are installed with red Loctite which is very difficult to remove. The longer screws on the other side are assembled with removable blue Loctite. When disassembling a handle you have to remove those screws and tap the pins out leaving the short screws in place. Some come right apart, some need a little help. There is .001" (half the diameter of a human hair) nominal clearance so things can be a little tight. This isn't a good project for a lot of folks, but if you're handy and have the tools it's do-able.

Nathan the Machinist said:
The holes on the tangs and the scales are located on CNC with circular interpolation then reamed to size. The location relative to each other is accurate to a fraction of a thousandths of an inch and the diameter is accurate to about a thou. The scales have some give (compared to steel) and are actually reamed a little over size because the holes shrink one or two thousandth's of an inch after reaming. The steel is reamed with a .2510 reamer, but as the tooling wears that hole can close up to .2500 before changing tooling. So, the tang hole is .250-.251, a total spread of .001".

The pins are turned here and the typical range is .2495-.2505, so there is a total spread of about one thou.

This means that some holes in the tangs can be as large as one thousandth of an inch over nominal (1/4") and some pins can be half a thou under nominal, so the pin could have as much as .0015" diametrical clearance. That's not a lot of clearance (a little less than the diameter of a human hair) but that pin will fit that hole without much effort. We try to avoid that much clearance.

On the flip side, some tang holes can be .2500" (nominal) and some pins can be as large as .2505" (half a thou over nominal) so there is half a thou interference. This is a light press fit and you have to force or tap them together. When we get into a batch with that much interference we'll usually put those pins aside and use some from another batch from the smaller end of the tolerance.

So, we aim for as close to line-to-line as we can, but accept that there are limits to the level of precision we can put into the pin/tang fit. So, some are very tight, some are less tight. All are "snug" with little or no slop. You may find yours can be removed without a lot of trouble, or you may find special tooling and techniques are required to pull yours apart. They're not made for ease of disassembly, but it's usually pretty do-able.

Nathan the Machinist said:
The sectional area of the minor diameter of an 8-32 screw is about .013" square inches. Steel screws weight about a gram. I wouldn't fool with aluminum screws.

Jo the Machinist said:
Q: On another note, can you please describe the process and grits used for polishing the scale screws for CPK's? I'd like to do some DIY polishing on my inventory.
A: We actually turn the screws on the lathe. There is no polishing. Thanks! Jo

https://www.bladeforums.com/threads/what-fasteners-are-used-in-the-lc.1407202/
https://www.bladeforums.com/threads/titanium-or-black-oxide-screws-fasteners.1615169/

Shoutout to

ironwagon for sending me

Casinostocks photo that does a great job illustrating the different fasteners.

AR-Trvlr · Sep 22, 2019

Boot Dagger (with sheath by Pirtle)

Specs:
Delta 3V, HRC 60.5
Blade length 4.438" from tip to guard
Blade width .9"
Total length 8.69"
Thickness at ricasso .205"
Sharpened 20 DPS
Black on black micarta (canvas or linen)
heat darkened titanium screws
Engineered skeletonized tang
4.9 oz, balances 7/8" behind guard

Discussions:
https://www.bladeforums.com/threads/cpk-boot-daggers.1747184/

Sales:
https://www.bladeforums.com/threads/fun-friday-sale-daggers.1756451/
https://www.bladeforums.com/threads/sold-forty-4-boot-daggers-delta-3v.1757573/#post-20105146
https://www.bladeforums.com/threads/sold-20-boot-daggers.1776626/

AR-Trvlr · Sep 22, 2019

Kephart

Specs:
Delta 3V, 60-61 HRC, .160" thick at ricasso (a little over 5/32") or AEBL
Total length 9.625
Blade length 5.0
Weight 7 oz
Edge angle 20 DPS
Grippy 3D machined scales in black or natural micarta
stainless steel fasteners
Part of the no-frills "economy" line indicated by the no-frills makers mark.

The bevels on our Kephart have an experimental bi-bevel geometry. They're milled twice at two different angles to simulate a convex grind (like the original) to reduce sticking in certain small wood splitting tasks. Unlike other production Kepharts, the scales on ours are pinned very solidly into place and can't shift around in hard use. The fit between our scales and tang is the best in the industry, they're practically perfect. This matters in a hand tool intended to be used for long durations.

Discussion:
https://www.bladeforums.com/threads/pre-order-for-the-new-kephart.1765336/page-5#post-20209752

Sales:
Pre-Order - https://www.bladeforums.com/threads/pre-order-kephart.1765708/

AR-Trvlr · Sep 22, 2019

Why Amazon

What is in the works at CPK?

This question recently came up again and I figured it warrants a thread Nathan, can you give us the order of the new blades that are coming so we can prepare our bank accounts? Ax, 8 inch integral Shiv, Amazon knife, kukri(I added that one), etc? Kephart Basic line 5-in field knife...

www.bladeforums.com

We're going to continue our signature series production here on Blade Forums, but we're also adding some more affordable simplified offerings for distribution on Amazon to gain some exposure to normal people. It's an experiment. I get a lot of complaints from folks about our confusing and frustrating business model, so it's an attempt to address some short comings for people who don't forum good.

Random Thought Thread

Who made your sheath? Jill Gregory made both sheaths in that photo. If you go to near the bottom of page 73 of the “Show Your CPK in Leather” thread, there are better pictures of the Behemother sheath. Mike

www.bladeforums.com

The most common complaint we have about our brand is the difficulty getting one. It shouldn't be difficult to get your gear. And anybody can order something on Amazon Prime...
We're going to do the FBA thing.
If we start getting assholes who buy one to beat it up and then return it we'll simply stop using Amazon and distribute them elsewhere. But I wanted to at least try this.

Mixed inventory

Your inbox is full, but will you be making any HDFK’s in the future? Thx The HDFK was a great pattern, I'm sure we'll revisit it in the future but it is not currently scheduled for production. We are experimenting with a no-frills "economy" line for distribution on Amazon in order to simplify...

www.bladeforums.com

We are experimenting with a no-frills "economy" line for distribution on Amazon in order to simplify our sales process for some basic work intended for a broad audience. We've chosen a couple of "Field Knives" for this experiment. One is a 5" basic Field Knife and the other is a 7" Super Duty Field Knife. It is possible that one of these may work for you? They will be available in late summer, starting with the 5".

AR-Trvlr · Sep 22, 2019

Utility Fighter 2 - 6"

(Note that this picture is of a prototype and production versions will differ slightly)

The 6" Utility Fighter was designed as a collaboration with US Army Green Beret Jason Landphair. It is a well made, durable, high performance mid sized utility combat knife optimized to carry light, tolerate rough use well beyond the abilities of "normal" knives, and function properly as a mid size fighting knife in addition to normal cutting chores. In this newest release of this very old pattern it has the Delta 3V heat treat that is optimized for edge stability so it will hold a sharp edge in rough use and the already excellent hand grip is even better. It flips from saber grip to reverse grip the same but there's just a little more hand protection with tweaked guards and thumb ramp and additional jimping.

A side effect of this heat treat is a higher percentage of free chromium, so although it is not stainless, it is nearly so.

The handle is 3D sculpted CNC machined and ergonomically designed for a standard forward, reverse, saber and pinch grips for an average sized hand. Unnecessary weight is removed where possible and the tang is internally skeletonized for a neutral balance. The blade is made of .188" CPM "Delta" 3V. Despite being light (8 oz) and ground relatively thin (.020" before sharpening) it will tolerate rough use in demanding environments. You can baton and pry with it. It will tolerate punching holes in sheetmetal, cutting iron wire and even chopping through cinder block without breaking or developing excessive damage. One of the design requirements when developing this knife was it would be capable of opening a hole in a masonry wall without risk of breaking. You could damage the edge if you set your mind to it, but it has exceptional edge retention and is practically unbreakable. It comes with my rough use warranty: if it ever fails for any reason short of intentionally breaking it I will replace, repair or refund. Broken tips get re-pointed, broken scales are replaced with a material of my choosing.

Specs:
CPM 3V, Delta heat treat, 60-61 HRC, .188" at ricasso
Total length 10.8"
Blade length 6.0"
Edge length 5.6", 20 DPS
Weight 8.0 oz
Extra grippy 3D machined scales
18-8 stainless steel fasteners
The price includes a very nice Mashed Cat Kydex sheath with TekLok.

I should clarify, there isn't a "military contract". I didn't said that. That sounds really cool but this isn't some "Pentagon procurement" project. They approached us to build knives for the graduating West Point class and after some discussion we determined the best knife for this was the Utility Fighter, which had been retired so we're dusting it off. It's an honor to make knives for these fine men and women and we're proud to provide a tool that was developed with an active duty professional soldier that is going to serve them well in their career, but I don't want to overstate our role here. This is a military customer but it isn't some formal "military contract". I wish it were, but we're still pretty small-fry. It was a special request that justifies re-releasing a retired pattern and we're glad to do it.

Even though Jason personally carried a double edge, he felt that single edge was the better configuration for most people and it is probably a more useful tool that way.

When I say dagger ground I mean that the top edge isn't just a sharpened swedge but there is a bevel ground into the spine that gets an edge. This is a relatively steep bevel and edge. However, on the double edged fighter I tweaked the blade shape to be more symmetrical and steepened the front bevel so there was real-estate for a more conventional rear bevel and both sides are sharpened at 20 DPS. This isn't just a modification of the UF, it is a different knife with different programs and fixtures. I'm not sure what we're going to do on this order, but it looks like there's enough to justify the DEF.

Pre-Order:
https://www.bladeforums.com/threads/pre-order-6-utility-fighter-2.1792008/

Discussions:

Updated UF 2

Hi, sorry if I have missed something, but are there any details about the updated U F 2?

www.bladeforums.com

Can I get some UF2 pictures?

My cheap cell phone doesn't take the best pictures (and neither do I) and I need some pictures of the UF2 for our website and other stuff. Could some of you folks who take good pictures help me by posting up some photos that I could use?

www.bladeforums.com

AR-Trvlr · Sep 22, 2019

Basic Field Knife

The Basic 5" Field Knife is a stout, medium sized woods knife and general purpose work knife for tradesmen and hunters. It is based on our very popular standard Field Knife, the FK2, but it has been tweaked in order to invite some tough love from you knuckleheads who don't want to beat on their standard Field Knife.

Some things have changed, some things are have stayed the same.

They are both 3/16" stock CPM 3V at HRC 60.5-61.0 with the Delta heat treat protocol
The handles are interchangeable

The primary grind is 1/4 degree steeper (slightly more obtuse)
(Per later comments from Nathan "it's thicker behind the edge. It can cut a 1/4" bolt without much of a mark, the standard FK not so much. Obviously, the standard FK cuts better. They're somewhat different animals.")
The edge is sharpened at 20 DPS, up from 18
The blade is 5/8" longer
The blade is not skeletonized (and is 2 ounces heavier, but the balance point is the same)
There is no hidden lanyard hole
The scales are somewhat simplified with less contouring. (It is still supremely comfortable and very well thought out)
There is no jimping on the thumb ramp
It is significantly less expensive and is begging for your rough love.

It is not overly thick. It is a strong performer, it cuts well. However you can not break this knife without tools such as a big hammer or a prybar. If you can break or significantly damage this knife I will replace, repair or refund. Go nuts.

Specs:

CPM 3V, Delta Heat treat protocol, 60.5 HRC, .188" thick at ricasso, sharpened 20 DPS.
Total length 10.4"
Blade length 5.5"
Weight 10.2 oz
Grippy 3D machined scales in your choice of black or natural micarta
18-8 stainless steel fasteners

Mashed Cat sheaths with semi rigid drop loop are custom made for these knives and are well designed and well made. TecLok available upon request.

Discussions
BFK Discussion - https://www.bladeforums.com/threads/the-basic-5-field-knife-thoughts-and-impressions.1814630/
Ghetto Grinds - https://www.bladeforums.com/threads/ghetto-grinds.1813884/

Sales
Fun Friday Sale - https://www.bladeforums.com/threads...ew-basic-5-field-knife.1807101/#post-20698465
Fifty Knives - https://www.bladeforums.com/threads/sold-big-sale-fifty-basic-5-field-knife-delta-3v.1809462/
Fifty Knives - https://www.bladeforums.com/threads/sold-big-sale-fifty-basic-5-field-knife-delta-3v.1811772/
Fifty Knives + Ghetto Grinds - https://www.bladeforums.com/threads/sold-final-big-sale-fifty-basic-5-field-knife-delta-3v.1814042/

AR-Trvlr · Sep 22, 2019

DEK2

Specs:
Delta 3V, 60.5 HRC, .200" thick at ricasso (a little over 3/16")
Total length 9.125
Blade length 4.5
Weight 7.5 oz
Edge angle 20 DPS
Grippy 3D machined scales in micarta or G10
Titanium fasteners
Hidden lanyard

DEK1, DEK2, and DEK3 Pre-Order - https://www.bladeforums.com/threads/closed-pre-order-dek1-dek2-dek3.1825461/

AR-Trvlr · Sep 22, 2019

DEK3

Specs:
10" hollow grind. Ground to tangent.
Delta 3V, 61.5 HRC, (.125" thick at ricasso (1/8") (Magnacut optional)
Total length 9.125
Blade length 4.5
Weight 4.8 oz
Edge angle 18 DPS
Grippy 3D machined scales in micarta or G10
Titanium fasteners
Hidden lanyard
Fiendishly sharp

DEK1, DEK2, and DEK3 Pre-Order - https://www.bladeforums.com/threads/closed-pre-order-dek1-dek2-dek3.1825461/

AR-Trvlr · Sep 22, 2019

K20 Wakizashi (the 20" Notta-Katana)

It is the size and weight of a traditional wakizashi and it more or less falls within the dimensional and kinetic windows of that kind of weapon however we are not saddled with the relatively low quality steel that traditional smiths were encumbered with and we will be able to make a sword here that will tolerate use that would destroy a historical sword. With that in mind I am pressing the primary grinds a little more narrow than normal for enhanced cutting ability, I'm giving it a little extra blade height to reduce the tendency of a long thin blade to wrap around a hard target, and I am adding a weighted pommel which moves the center of gravity back to only 3/4" ahead of the guard for excellent one handed control and the addition of a little weight in the tang translates into a little bit more cutting power in a hit (trust me, it works). If you remember the traditional sword on "Knife-or-death", it got all screwed up in that cutting competition. This sword won't be like that. This sword could probably cut that sword in half.

Per Nathan, K20 stands for Keffeler, 20 inch. Dan designed the K18 and collaborated on the K20. I'm not a sword expert so I work with someone who is. He is a world renowned sword expert with many many national and world cutting championships under his belt. I'm a machinist with many many beers under my belt. So, as a rule, I expect most of my sword type offerings are probably going to have a K prefix on them.

Specs:
Delta 3V, .190" 60.5 HRC
Total length 28.75
Blade length 20.0
Weight 1lbs 11 oz
Edge angle 20 DPS
Grippy 3D machined scales, grey or green TT

Discussions:
https://www.bladeforums.com/threads/poll-how-many-people-are-in-for-20-cpk-notta-katana.1800501
K20 Picture Gallery https://www.bladeforums.com/threads/k20-picture-gallery.1963069/

Pre-Order: https://www.bladeforums.com/threads/open-pre-order-k20-wakizashi-the-20-notta-katana.1876178/
Pre-Order K20.1: https://www.bladeforums.com/threads/pre-order-k20-1-wakizashi.1977815/

AR-Trvlr · Sep 22, 2019

Super Duty Field Knife (SDFK)

This is a full 1/4" of Delta 3V goodness

7" blade length, 12 1/4" total length, 1lbs 1 oz (14.8 oz for the Signature series)

Despite the significant amount of blade on this fat girl it does just balance on the first finger. The handle is designed to accommodate a three-finger grip to get a little extra length for some use as a small chopper.

Sharpened 22 DPS, HRC 60.5

Highly corrosion resistant (for a tool steel), good abrasive wear resistance, practically unbreakable, and with the Delta heat treat it has good edge stability and will remain sharp in all kinds of crazy use that would wreck most knives. Comes with one of the best sheaths in the business.

Despite being practically unbreakable, our primary grind geometry isn't overly obtuse and our thickness behind the edge is pretty reasonable. These knives cut like you would expect from us. We know what we're doing.

$363 ($350 plus $13 shipping) for the basic series (this is a lot of knife for the money)

Your choice of black or natural micarta scales. There are also some special scales materials options (inquire with Jo) and also some attractive fully machined titanium screws for $15 extra if you want that.

This knife comes with our rough use warranty. If it ever fails for any reason short of intentionally breaking it (can't be done with your monkey meat, it's going to take some tools), I will replace, repair or refund your knife. You can't break this knife.

https://imgur.com/sU6ep9q

Sales

SOLD, Forty, 7" Super Duty Field Knife, Delta 3V

These are the basic series. There will be a signature series in a future sale. This is a full 1/4" of Delta 3V goodness 7" blade length, 12 1/4" total length, 1lbs 1 oz (14.8 oz for the Signature series) Despite the significant amount of blade on this fat girl it does just...

www.bladeforums.com

Discussion

The (un)Official SDFK Thread

My apologies - I just had to do it. I am an organized individual and it's been driving me crazy to have to blunder through multiple threads to find snippets of info regarding the much anticipated SDFK. I thought it might be helpful to have a place where we could compile the info as we know it...

www.bladeforums.com

SDFK is Glorious

I just got back from a weekend trip with the family and my SDFK was waiting for me. I know Nathan mentioned she was a big girl, but damn she thiiiiiick! I somehow was not expecting the thickness, but oh boy does it feel great. I think the handle is perfect for my sized hands with this sized...

www.bladeforums.com

AR-Trvlr · Sep 22, 2019

Unique Knives These are some of the various knives that were done as one-off projects or are otherwise unique and deserve a mention.

CPK Table Knife A one-off custom CPK because

tinfoil hat timmy asked nice? Never for sale or trade, if you get tired of it just throw it away. The CPK table knife. In its ridiculous glory. OMG. It can't cut a chain. But it can spread cheese curds at high speed and low drag.

Tragic Unfortunate Retro Design (TURD™) CPK 7“ Bowie Knife Made entirely (and badly) by Nathan the Machinist (Mark's skilled hands had no role here), this ill-conceived design abomination of 1/4" thick Delta 3V is sharpened at 20 DPS and is probably illegal where you live because many jurisdictions specifically forbid Bowies and double edge at this length. It offers a rare combination of not-particularly-useful and illegal-to-carry in a very expensive package that screams "why does this exist". Discussion: https://www.bladeforums.com/threads/7-bowie.1906963/

DEK-0 This is a modified DEK1, but it really isn't a DEK1 anymore. Fin Friday Sale https://www.bladeforums.com/threads/open-fun-friday-sale-dek-0-open.1832252/

Mark's Hollow-Ground 6" Fighters Two hollow ground 6” fighters. One has a standard tip, and one is a modified Tanto.https://www.bladeforums.com/threads/old-sold-marks-fun-friday-sale.1880316/

WEAPONIZED K18 https://www.bladeforums.com/threads/fun-friday-weaponized-k18.1781431/

AR-Trvlr · Sep 22, 2019

Shiv 2.0

The 8" Shiv is a titan in the history of CPK classics. If you've never held one, you should, it is a brilliant knife/weapon. It is not light and lively like an ABS "fighter", it is light with weight on the ends. It's a robust stabbing weapon that can easily defeat thick clothing and Kevlar body armor, and a modern combat knife intended for reliable hard work in difficult conditions.

These were originally made during the wars in Iraq and Afghanistan. It's the fighter that the UF was derived from. It is the UF on steroids and dialed up to 11. The UF is compact and reasonable, the Shiv is not.

It is long, narrow and 1/4" thick Delta 3V with a reinforced in-line point (thick diamond shaped cross section) skeletonized tang and functional deep fullers. It balances directly ahead of the guard. It was made to stab in a straight line, resist deflection, and was originally intended to pry open a glove box, open holes in a masonry wall, and breach a door and the fellow behind it.

The guard is large and is designed to fit the hand and thumb when held at 45 degrees across the palm in a saber grip and also aligns perfectly with your hand when held in a reverse grip. The grip is designed to be spun in the hand into a reverse grip and for the thumb to go over the end. This fits a large hand.

The grip on the UF was derived from the Shiv, and now the grip on the Shiv is derived from the updated UF. But without the compromises in geometry to keep it compact and help it lay flat. The grip is thicker and more pronounced so the knife will remain aligned with your arm and point straight. With some use you will know exactly where the point is with your eyes closed, reverse or forward.

There are some updates with the new release of this classic pattern. Compared to the original Shiv, there is the thumb ramp jimping and deep chamfers we have become known for (these are found on some of the later production OG Shivs). The finger guard is a little bigger. The heat treat is now our fully optimized Delta Heat Treat (an early version of this was also found on the last few OG Shivs to leave the shop, though they were un-marked.) The hand grip has been tweaked a little. The primary grind has been narrowed a hair and the fuller has been adjusted to compensate (I'm keeping the weight and balance roughly the same through the distribution of material and the sectional modulus is basically unchanged). I'm stretching the point out 1/2" to give it a full 8" edge length rather than 8" tip to scale. Due to advances in our heat treat, the edge is now sharpened at 20 DPS rather than the original 22.

Specs:
Delta 3V, 60.5 HRC, .250" thick at ricasso
Total length 13.25
Blade length 8.0 (8.5 tip to scale)
Weight 12 oz
Edge angle 20 DPS
Grippy 3D machined scales in micarta or G10
Fully machined 6AL4V titanium Torx head fasteners in precision ground steel pins

Discussion: https://www.bladeforums.com/threads/shiv-shiv-shiv.1973944/

Pre-Order - https://www.bladeforums.com/threads/closed-pre-order-the-return-of-the-8-shiv.1894220/

AR-Trvlr · Sep 22, 2019

Tantosaurus

Started life as a 12-inch Behemother chopper. The thickest, heaviest and (other than the K18) the most powerful chopper in the CPK lineup.

SPECS:
Blade length 11 in Delta 3v w/ acid washed finish, 17 in overall
.25 thick at Ricasso w/ distal taper all the way to tip
Hand chamfered spine
Black Linen Scales w/ Ti fasteners

Discussion: https://www.bladeforums.com/threads/11-shiv-pig-sticker-abdominal-ventilation-device.1933039/

AR-Trvlr · Sep 22, 2019

Fireman's Knife

A breaching tool pattern designed by and for firemen to open holes in things.

6" Blade, .350" thick, Delta CPM 3V, HRC 60.5, sharpened 45 degrees on one side

12 3/16" total length

1 pound, 9 oz

Total lateral strength (cantilevered one side unsupported lateral strength) 1,500 lbs

Can be used as a cold chisel, used with a "cheater bar" and also hammered upon.

View attachment 2334738

Links:

https://www.bladeforums.com/threads/firemans-knife.1951355/

https://www.bladeforums.com/threads...-do-with-a-sharpened-pry-bar-thread”.1951297/