Benchmade – 2900BK – Full Immunity – Automatic Knife – CPM M4 Coated Wharncliffe – 6061 T6 Aluminum – Crater Blue


Full Immunity – Automatic Knife – CPM M4 Coated Wharncliffe – 6061 T6 Aluminum – Crater Blue

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SKU: 610953206550 Categories: , , GTIN: 2900BK
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The 2900BK AUTO IMMUNITY™ knife is the result of a specific need that arose among federal employees and individuals constrained by blade length regulations in various jurisdictions, where carrying a blade over 2.5” is prohibited in most federal buildings. This compact yet versatile folder, equally adept at daily utility tasks and serving as a discreet self-defense tool in non-permissive environments, is the solution you’ve been seeking.

Designed for Precision:

The AUTO IMMUNITY™ features a clipped Wharncliffe blade style crafted from CPM-M4 steel, renowned for its exceptional edge retention.
This high-performance steel supports the knife’s needle-thin tip, directing all cutting force to its razor-sharp point.
Whether you require a utility blade or a self-defense tool, the AUTO IMMUNITY™ delivers on both fronts.
Additionally, an included lanyard extends the handle, ensuring a secure and comfortable grip.
A Knife for the Times:

The AUTO IMMUNITY™ was conceived, designed, and developed entirely during the pandemic, hence its fitting name.
This knife is a testament to innovation and adaptability, catering to the evolving needs of today’s world.

Blade Length: 2.49” | 6.3246cm
Blade Thickness: 0.09” | 2.286mm
Open Length: 5.94” | 15.088cm
Closed Length: 3.46” | 8.788cm
Handle Thickness: 0.5” | 12.7mm
Weight: 2.37oz | 67.188g

Blade Edge: Plain
Blade Finish/Color: Cobalt Black
Blade Steel: CPM-M4 (62-64)
Blade Style/Shape: Wharncliffe
Clip Type: Mini Deep-Carry
Clip Position: Tip-Up
Glass Breaker: No
Handle Material: Aluminum
Handle Color: Crater Blue
Lanyard Hole: Yes
MOLLE Compatible: No
Use: Tactical
Blade Style: Plain Wharncliffe
What’s more, you can experience this item for yourself by holding, smelling it, or even taking a selfie with it in person at our local store, Sharp Things OKC, located at 6610 N. May Ave., Oklahoma City, OK 73116. Alternatively, you can purchase with confidence here online at You will experience world-class customer service in either environment. Don’t miss out on this exceptional product – add it to your cart and your collection today. Feel free to give us a call 7 days a week anytime between 9 AM and 9 PM at 405-286-2112 with any questions.

Additional information

Weight 0.25 lbs
Dimensions 5 × 2.75 × 1.75 in


Blade Material

Blade Finish

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