KastKing Spartacus Fillet Knife Review
Our verdict
The KastKing Spartacus is a $29.99 fillet knife and sheath set built from 8Cr14 stainless steel, and its 4.6 star average across 778 reviews puts it in the same rating tier as the pricier BUBBA knives. Amazon shows 0+ bought in the last month, a weaker recent demand signal than every other knife in this comparison.
Check price on AmazonBest for
Anglers who want a fillet knife that comes bundled with a sheath for storage and transport, at a mid-range $29.99 price backed by a 4.6 star average across a meaningful 778 review sample.
Skip if
Skip it if recent sales momentum matters to you, since Amazon lists 0+ units bought in the last month here versus 50 to 300+ for the other fillet knives covered in this comparison.
- Material 8Cr14 Stainless Steel
- Weight 15.16 Ounces
- Length 16.92 Inches
- Size B: 9'' Fillet Knife
- Color White
- Pieces 1.0 Count
Our scorecard
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Owner rating4.6/5
4.6 average across 778 owner ratings
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Popularity3.8/5
778 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other fishing gear and tackle we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
Storing a fillet knife safely between trips is half the battle, and the KastKing Spartacus addresses that directly by pairing the knife with a sheath rather than selling the blade alone. It costs $29.99, placing it firmly in the middle of this comparison's price range.
The blade is 8Cr14 stainless steel, a mid-grade stainless alloy, and the knife weighs 15.16 ounces, heavier than the ounce-range Rapala knives but far lighter than the pound-plus BUBBA models. The listed length figure of 16.92 inches likely reflects the knife and sheath together rather than the blade alone, since the size field separately notes a 9 inch fillet knife. It ships in white and includes the sheath as a listed feature alongside the blade itself.
Its 4.6 star average across 778 reviews matches the Kershaw 1259X's rating and sits just below the 4.7 stars the BUBBA 1095705 holds, so the KastKing Spartacus is competitive on satisfaction. Where it falls behind is recent demand: Amazon lists 0+ bought in the last month, compared to 50+ to 300+ for every other knife in this lineup. At $29.99 it undercuts both BUBBA models significantly while still including a sheath, a feature none of the cheaper Rapala or Kershaw listings mention.
Pros
- Includes a sheath alongside the blade, a feature not listed on the Rapala or Kershaw alternatives here
- 4.6 star average across 778 reviews matches the Kershaw 1259X's rating
- 8Cr14 stainless steel blade resists corrosion from repeated fish and water contact
- At $29.99 it costs a fraction of either BUBBA model in this comparison
- 15.16 ounces keeps it lighter than the pound-plus BUBBA electric-style knives
Cons
- Amazon lists 0+ units bought in the last month, the weakest recent demand signal in this comparison
- 778 reviews is a smaller sample than the 1,800 to 6,300 reviews behind the BUBBA models
- At $29.99 it still costs about three times more than the $10.49 Rapala 126SP
- The listed 16.92 inch length figure is harder to interpret since the size field separately lists a 9 inch blade
Specifications
| Material | 8Cr14 Stainless Steel |
|---|---|
| Weight | 15.16 Ounces |
| Length | 16.92 Inches |
| Size | B: 9'' Fillet Knife |
| Color | White |
| Pieces | 1.0 Count |
| Feature | Fillet Knife and Sheath |
Performance notes
A fillet knife and sheath combo is built around portability as much as cutting, and the included sheath here means the blade can go straight into a tackle bag or boat storage without a separate cover. 8Cr14 is a mid-tier stainless steel commonly used on knives in this price range, offering reasonable edge retention and corrosion resistance without the cost of premium steel. At 15.16 ounces, the Spartacus sits well above the featherweight Rapala knives but far below the 4-plus pound BUBBA models, which points to a knife built for one-hand control rather than motor-assisted cutting. The 9 inch blade length noted in the size field is on the longer end for a fillet knife, suited to bigger fish where a single long stroke covers more of the fillet in one pass.
What buyers say
A 4.6 star average across 778 reviews is a healthy rating on a meaningful sample size, close behind the top-rated BUBBA 1095705 and tied with the Kershaw 1259X. What stands out is the 0+ bought in the last month figure, the only knife in this comparison without an active recent purchase signal, while every other listing here shows at least 50+ monthly buyers. That gap does not necessarily reflect quality, since the star rating and review count both hold up well, but it does suggest the Spartacus's sales have cooled compared to when its 778 reviews accumulated, or that current visibility for this listing has dropped relative to the other knives.
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Frequently asked questions
Does the KastKing Spartacus come with a sheath?
Yes, the listing includes a sheath alongside the fillet knife itself, a feature the Rapala and Kershaw alternatives in this comparison do not list. At $29.99 and 15.16 ounces, the Spartacus pairs that included storage with a mid-range price and weight compared to the other knives here.
What steel is the KastKing Spartacus blade made from?
It uses 8Cr14 stainless steel, a mid-grade stainless alloy that balances edge retention and corrosion resistance at this $29.99 price point. The 9 inch blade listed in the size field adds reach for larger fish, while the included sheath protects the edge between uses.
Is the KastKing Spartacus still selling well?
Its 4.6 star rating across 778 reviews is solid, but Amazon lists 0+ units bought in the last month, the lowest recent demand figure among the fillet knives in this comparison. The rating itself has not slipped, so the gap looks like a recent sales lull rather than a quality issue.