C60 Massad Ayoob

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The C60 Massad Ayoob was introduced in 2001 and discontinued in 2002. A sprint run with G-10 handles was released in 2011.

Appearance in catalogs

The C60 Massad Ayoob appeared in the following:


Massad Ayoob

Massad Ayoob Makers mark

History, mentionings from the forums etc.

On Bladeforums: [1] discussing the original version as well as plans for the sprint run that came out in 2011. Massad Ayoob comments on the design of the knife in post #40. His post says:

The rationale was to get the blade directly in line with the radius bone of the forearm when the average human wrist was in the "locked" position, which puts the middle knuckle of the hand directly in line with the axis of the forearm.

This is what gives the C60 its superior stabbing accuracy that posters in this thread have mentioned, and it also gives tremendously more penetration, because it aligns the skeleto-muscular support structure of the arm with the point (number one), and therefore with anyone who knows how to put his weight behind a punch, gets the entire body's force going directly behind the point (number two).

As other posters have also noted, the handle-to-blade angle puts much more force behind a slash as well as a stab. Instead of the blade "skimming" over the target as it hits hard resistance such as bone, the 90 degree angle of the blade when held in reverse grip (and KEPT there by a handle shape that allows the thumb to lock it at that angle) the C60 is more likely to shear directly through whatever resistance it encounters. Because of the design features, something very similar happens with a slash from the conventional saber or pekal grasp.

As to the tip-down carry: I'm one of those early Spyderco fans whom Sal calls "Clipiteers," [:-)] who started their Spyderco experience with the original Police model, learned to open it with a pinch-snap, and discovered we could win bets beating guys with bali-songs and even "automatic knives" in opening speed. The pinch snap uses the gross motor movement of the closed hand instead of the more fine-motor skill of using the thumb to open the blade via the original design intent of the "Spyder-hole."

As has also been noted (you guys n' gals are sharp, no pun intended) the C60 had ambi holes drilled so the clip could be moved for southpaws. I did not consider tip-up carry in the design parameters, and would have to go back and play with the concept a lot more to see how well it would work in that fashion. I realize that a lot of folks are as habituated to tip-up carry as I am to tip-down.

In the aforementioned thread, Massad tells us that the pronunciation of his first name rhymes with "brass".

Information from the Spyderco catalog on the web

Spyderco Masaad Ayoob (sprint run)

Masaad Ayoob is an established authority and writer on firearms and knives. For more than four decades he has taught defensive knife and firearm programs and appears frequently as an expert witness in trials involving edged weapons. Along the way he developed an all-purpose tactical folder suited to his preferences that is the Spyderco C60 Massad Ayoob CLIPIT.

Most unusual about his folder is its radical angle of the handle to the blade. Ayoob explains: “With a typical knife, thrusting lifts the blade’s point above the line of the forearm, like a boat prow going through water. The faster, harder or more resistance encountered, the higher the prow rises deviating the blade off course from its original target which can mitigate the depth of the cut and can cause the blade to literally ‘skid’ when a resistant surface is hit.”

The C60’s radical angle brings the blade into line with the long bones of the forearm, channeling the body’s force directly behind the line of the cut resulting in minimized blade deviation and maximized accuracy. Because of the blade to handle angle, the Ayoob has a short opening arc, translating into fast opening.

The Spyderco Masaad Ayoob features also include a PlainEdge VG-10 stainless steel blade with a deep belly for maximized slicing potential. It has a notably strong lock-back with a David Boye style release lever that helps ensure safe lock-up. The black G-10 handle has an ergonomic thumb rest at the rear of the blade and a steel pocket clip for right/left hand tip-down carry.

The Spyderco Ayoob is a limited number Sprint Run. The C60G Massad Ayoob in Spyderco's online catalog.


The C60 Massad Ayoob is made in Seki-City, Japan and has a:

SKU Handle Edge(s) Steel From/To MSRP Note Number made Grind Clip Clip positions Collectors club
C60P Black Almite coated Aluminum PE VG-10 2001-2002 165.95$ (2001) N/A Hollow Metal LH/RH, TD
C60S Black Almite coated Aluminum SE VG-10 2001-2002 165.95$ (2001) N/A Hollow Metal LH/RH, TD
C60G Black G-10 PE VG-10 2011 249.95$ (2011) Sprint Run N/A Hollow Black Metal LH/RH, TD
C60GPGY GreyG-10 PE Cru-Wear 2022 $300.00 (2022) Sprint Run N/A Sabre grind Black hourglass 4-way LH/RH, TD/TU
C60GSGY GreyG-10 SE Cru-Wear 2022 $300.00 (2022) Sprint Run N/A Sabre grind Black hourglass 4-way LH/RH, TD/TU

Most collectible variation

The black almite first run numbered seem to be the most collected version.

Questions regarding collecting the C60

Some interesting questions we are looking for an answer to:

Questions with an answer:

Technical information

Measurements (mm and grams) of the C60 Massad Ayoob:

Variation Length overall Length closed Length blade Length edge Hole Ø Blade thickness Weight
C60P 214mm 122mm 92mm 84mm 12mm 3mm 122g
C60S 214mm 122mm 92mm 84mm 12mm 3mm 122g
C60G 219mm 128mm 92mm 84mm 12mm 3mm 140g

Measurements (inches and ounces) of the C60 Massad Ayoob:

Variation Length overall Length closed Length blade Length edge Hole Ø Blade thickness Weight
C60P 8 7/16" 4 13/16" 3 5/8" 3 1/4" 15/32" 1/8" 4.3 oz.
C60P 8 7/16" 4 13/16" 3 5/8" 3 1/4" 15/32" 1/8" 4.3 oz.
C60G 8 5/8" 5 1/32" 3 5/8" 3 1/4" 15/32" 1/8" 4.9 oz.



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