Spyderco Stuart Ackerman Sustain Fixed 6.19" CPM 20CV Satin Plain Blade, Black G10 Handles - FB39GP


MSRP* : $310.00 | You Save* : $93.00 (30%)
Part #: SPFB39GP | Spyderco Knives
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SPFB39GP: FB39GP Sustain
Custom knifemaker Stuart Ackerman specializes in extremely practical, incredibly functional designs inspired by his own real-world experience as an avid outdoorsman and a former infantryman in the Angolan Bush War. Based on his best-selling handmade "Slither" model, the Spyderco Sustain is a truly formidable fixed-blade knife that reflects the hard-won insights of its designer.

The Sustain's broad blade is saber ground from premium CPM 20CV—an advanced particle metallurgy stainless steel renowned for its edge-holding ability and extreme corrosion resistance. A prominent swedge (unsharpened bevel) on the spine of the blade reduces weight and ensures an acute point without sacrificing strength. It also balances the handle's sturdy, full-tang construction to give the knife an amazingly deft, lively feel in the hand. The handle's refined shape includes a subtle sub-hilt for enhanced purchase and an understated, but highly effective, integral guard. Its smooth G10 scales are meticulously radiused and secured to the tang with concealed pins to offer a clean, extremely comfortable grip.

To protect the knife when not in use and provide comfortable, convenient carry in the field, the Sustain comes complete with a handsomely crafted leather pouch-style sheath.
  • Blade Length: 6.19"
  • Cutting Edge: 6"
  • Overall Length: 11.5"
  • Blade Thickness: 0.118"
  • Blade Material: CPM 20CV
  • Blade Grind: Saber
  • Blade Edge: Plain
  • Blade Style: Drop Point
  • Handle Material: G10
  • Sheath: Leather
  • Model Number: FB39GP
  • Model Name: Sustain
  • Designer: Stuart Ackerman
  • Weight: 10.3 oz.
  • Made in Taiwan

UPC Code: 716104650903

G10 Handles
G10 Handles Formed in a sheet under high pressure by combining fiberglass and an epoxy resin binder. These handles are lightweight and shaped to ensure a solid grip.
Leather Sheath
Leather Sheath Leather is known for its durability and traditional appeal. When compared to Kydex it is preferred for its silence when bumped against other objects, as well as blade retention.
Spyderco Stuart Ackerman Sustain Fixed 6.19" CPM 20CV Satin Plain Blade, Black G10 Handlesrated 5.000 stars out of 5 (5 reviews)
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Spyderco Stuart Ackerman Sustain Fixed 6.19" CPM 20CV Satin Plain Blade, Black G10 Handles
rated 5 stars out of 5
Tom H
Oct 25, 2019
Pros: Materials, Handle Material, Blade Material, Finish, Weight, Overall Quality, Blade Sharpness
Cons: Sheath/Scabbard, None
Concealable SD Knife
It appears Sustain is more reflective of Stuart Ackerman’s, “… infantryman in Angolan Bush War,” experience, than his New Zealand bush/outback experience. Although, this could be used for hog hunting, Sustain lacks belly in the blade that most folks prefer in a bushcraft/hunting knife. I find the guard (finger choil of handle) inadequate for a dedicated stabbing/hog hunting knife, where the knife could come to an abrupt stop on a bone, but your hand keeps on going. Maybe not one to grab for the bush, but, Sustain works well as a highly concealable SD fixed blade (not much here to snag on clothing). >>>>>>>>>>>>>>>>>>>>> The blade has an Al Mar look to it. I tried to find a picture of the original Slither to compare, but photos of Slither seem as rare as the original knives, and they must be rarer than hen’s teeth if Sal had to wait so long to get his hands on one. >>>>>>>>>>>>>>>>>>>>>>> Arrived sharp. Bigger than it appears in the photo. Excellent balance, fulcrum at index finger. Fine fit n finish. Another reason this may not be appropriate for hog hunting is the narrow handle (about ½”wide). Compared to 1” wide OKC, Spec Plus handles, or 3/4” wide handle on the Maserin Boar Bowie (Part #: ME977MCV), the handle of Sustain is not hand filling, and is a bit unstable of grip for dedicated hog hunting (tendency to twist/roll in hand under lateral stress, etc.). The G 10 is relatively smooth. It could use black athletic tape/stair tread tape, etc., to improve grip on handle. But, the handle is excellent for a ‘low profile/low snag’ conceal carry knife (sheath excepted). >>>>>>>>>>>>>>>>>>>>>>>>>>>> Spyderco Disdain: This leather pouch sheath is totally inadequate for anything other than parade and display. The knife rides so deep in the sheath, ya gotta’ send a prairie dog down in there to find the handle before you can draw it. If you’re going to use the sheath, attach a large bead choked-up to the pommel and it will be much easier to draw from the sheath. With no sheath liner, or rivets, this sheath is destined to failure (slice-thru) with moderate carry/use. Sustain definitely deserved a Boltaron sheath. I won’t deduct a star: Stuart Ackerman’s knife design is 5 star, the sheath is 2 star (In my book. I know some folks will like it, and they’re not wrong. Just preference).
Spyderco Stuart Ackerman Sustain Fixed 6.19" CPM 20CV Satin Plain Blade, Black G10 Handles
rated 5 stars out of 5
Glendale, Az
Oct 05, 2018
Pros: Blade Sharpness, Sheath/Scabbard, Handle Material, Blade Material, Materials, Weight, Overall Quality, Finish
Cons: None
Sleek and Functional Blade
The Sustain is very light and thin. Two things I actually prefer when using a knife outdoors. I've done a few bushcraft tasks with this blade (made a friction fire set, carved a few deadfall traps, and harvested natural materials for cordage making) and it did well at all those tasks. I was drawn to this particular knife as I'd handled similar custom knives while in New Zealand that are used in hunting wild boar on the islands. The Sustain is along those same lines, and could easily fulfill that role as well as doing any other knife tasks you'd have to perform while out in the bush.
Spyderco Stuart Ackerman Sustain Fixed 6.19" CPM 20CV Satin Plain Blade, Black G10 Handles
rated 5 stars out of 5
Los Angeles
Jun 07, 2018
Pros: Sheath/Scabbard, Finish, Overall Quality, Weight, Blade Material, Blade Sharpness
Cons: None
Favorite using knife
Love the lines, reminds me of a classic Mediterranean style knife. Long & lean, it is functionally somewhere between a kitchen knife & a dirk with some fillet dna thrown in. I also really like full pouch sheaths. I use it for kitchen duty at home and everything short of chopping in camp. $35 hatchet for that.It will slice tomatoes thin enough to see through. 20cv takes effort to sharpen, but it takes a scalpel edge. Holds a usable edge for a week long trip, no problem. Strop it occasionally. Use spyderco sharpener, works well. This is a great package for me, but is thin & not entirely forgiving. Some folks use knives in such a way that they require a 5mm spine & a hatchet edge grind or the blade is doomed. Not the knife for those guys. But it has taken over my kitchen & forestry service satchel.
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