Piranha 21 Tactical Automatic Knife – Black CPM S30V Drop Point (3.375")
American-Made Precision. Premium Steel. Lightweight Performance.
The Piranha 21 Tactical Automatic Knife combines American-made craftsmanship, premium blade steel, and a lightweight design in a sleek, all-black automatic folding knife. Designed for everyday carry, outdoor utility, and tactical applications, the Piranha P-21BKT delivers an impressive combination of cutting performance, convenient push-button operation, and pocket-friendly portability.
Featuring a 3.375-inch black CPM S30V stainless steel drop point blade, the Piranha 21 offers excellent edge retention, wear resistance, and corrosion resistance. Its black aluminum handle provides a durable yet lightweight foundation, bringing the total weight to just 2.67 ounces.
With its streamlined profile, automatic side-opening mechanism, and right-hand tip-up pocket clip, this USA-made automatic knife is a practical choice for enthusiasts who appreciate premium materials and distinctive styling.
Key Features & Benefits
Premium CPM S30V Steel – Exceptional Edge Retention
At the heart of the Piranha 21 is its 3.375-inch CPM S30V stainless steel blade, a premium powder-metallurgy steel developed specifically for high-performance cutting tools.
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Excellent edge retention: Maintains cutting performance through extended everyday use.
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High wear resistance: Vanadium-rich steel chemistry helps resist abrasive wear.
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Good corrosion resistance: Stainless steel construction offers dependable protection with proper maintenance.
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Versatile drop point profile: Provides a practical balance of cutting control, tip strength, and everyday utility.
The flat-ground blade features a plain cutting edge and a sleek black finish, completing the knife's understated tactical appearance.
Push-Button Automatic Opening
The Piranha 21 features a side-opening automatic mechanism activated by a push button.
The automatic opening system provides convenient one-handed blade deployment, while the button-lock design secures the blade in the open position during normal cutting tasks.
This straightforward mechanism combines traditional automatic knife functionality with a contemporary folding design.
Lightweight Black Aluminum Handle
Built around a durable black aluminum handle, the Piranha 21 offers an excellent balance of strength, portability, and comfort.
At just 2.67 ounces, it is exceptionally lightweight for a full-size automatic folding knife. The 4.25-inch closed handle makes it easy to carry without unnecessary bulk.
The all-black finish complements the blade for a clean, coordinated tactical appearance.
Right-Hand Tip-Up Pocket Carry
A right-hand, tip-up pocket clip provides convenient carry and accessibility. The lightweight aluminum construction and streamlined proportions make the Piranha 21 suitable for everyday pocket carry wherever automatic knives are legally permitted.
Proudly Made in the USA
The Piranha 21 Tactical Automatic Knife is made in the USA, combining premium CPM S30V blade steel with American manufacturing.
For knife enthusiasts seeking a lightweight, American-made automatic knife with premium materials, the P-21BKT offers an attractive combination of functionality, quality, and distinctive design.
Piranha 21 Tactical Automatic Knife Specifications
| Specification |
Details |
| Brand |
Piranha Knives |
| Model |
21 Tactical |
| Model Number |
P-21BKT |
| Overall Length |
7.625" |
| Blade Length |
3.375" |
| Cutting Edge |
3.25" |
| Blade Width |
0.75" |
| Blade Thickness |
0.18" |
| Blade Steel |
CPM S30V Stainless Steel |
| Blade Style |
Drop Point |
| Blade Grind |
Flat |
| Blade Finish |
Black |
| Edge Type |
Plain Edge |
| Handle Length |
4.25" |
| Handle Width |
0.75" |
| Handle Thickness |
0.50" |
| Handle Material |
Aluminum |
| Handle Color |
Black |
| Weight |
2.67 oz. |
| Opening Mechanism |
Push-Button Automatic |
| Lock Type |
Button Lock |
| Pocket Clip |
Right-Hand, Tip-Up |
| Country of Origin |
USA |
| Recommended Use |
Tactical, Everyday Carry, Outdoor Utility |
Why Choose the Piranha 21 Tactical Automatic Knife?
The Piranha 21 P-21BKT stands out for its combination of premium materials and lightweight everyday practicality. Its CPM S30V drop point blade delivers dependable cutting characteristics, while its aluminum handle keeps weight to a minimum.
Whether you're adding another American-made automatic to your collection or looking for a premium folding knife for regular utility tasks, the Piranha 21 delivers a compelling balance of blade performance, portability, and design.
Explore more folding automatic knives at Southern Sporting Goods, including premium and everyday-carry models.
Frequently Asked Questions
Is the Piranha 21 Tactical Knife made in the USA?
Yes. The Piranha 21 Tactical P-21BKT is manufactured in the United States and features premium CPM S30V stainless blade steel.
What steel is used in the Piranha 21 automatic knife?
The Piranha 21 features CPM S30V stainless steel, known for its excellent edge retention, wear resistance, and good corrosion resistance.
How much does the Piranha 21 Tactical weigh?
The Piranha 21 weighs just 2.67 ounces, making it a lightweight option for everyday pocket carry.
Is the Piranha 21 an OTF or side-opening automatic knife?
The Piranha 21 is a side-opening automatic folding knife. Its blade pivots outward from the handle when the push-button mechanism is activated.
Does the Piranha 21 have a pocket clip?
Yes. The knife includes a right-hand, tip-up pocket clip for convenient carry.
Please verify applicable state and local laws before purchasing or carrying an automatic knife.
