Benchmade 9400BK-03 Osborne AUTO Folding Knife 3.4" CPM-MagnaCut Black DLC Battlewashed Plain Blade, Burnt Copper Aluminum Handles
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$350.00

rated 5.0 stars out of 5 Read 3 reviewsWrite a Review
Part #: BM9400BK03 | Benchmade Knives
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Description

BM9400BK03: 9400BK-03 Osborne AUTO Folding Knife - Burnt Copper

Benchmade

Inspired by overland adventure and stylish daily carry, the 9400BK-03 Auto Osborne is Benchmade's nod to the rugged folks who enjoy dusty, gritty, challenging trek across natural terrain. Reimagined with fast-deploying push-button automatic action and an integrated spine safety, this latest variant of the 9400 Auto Osborne features a wear-and-corrosion-resistant CPM-MagnaCut reverse tanto blade with DLC Battlewash finish. Clad in lightweight Burnt Copper anodized 6061-T6 aluminum handle scales to tackle the outdoors, the 9400BK-03 Auto Osborne combines rapid response and timeless knife design for hardcore exploration.

Specifications

  • Blade Length: 3.40" (8.64 cm)
  • Blade Thickness: 0.115" (2.921 mm)
  • Blade Material: CPM-MagnaCut Premium Stainless Steel
  • Blade Hardness: 60-62HRC
  • Blade Style: Modified Reverse Tanto
  • Blade Finish: Black DLC Battlewash
  • Handle Material: Burnt Copper Aluminum
  • Weight: 2.65 oz. (75.13 g)
  • Clip: Split Arrow, Reversible, Tip-Up
  • Lock Mechanism: Push Buton
  • Overall Length: 7.87" (19.99 cm)
  • Closed Length: 4.47" (11.35 cm)
  • Handle Thickness: 0.43" (10.92 mm)
  • Country of Origin: USA

UPC Code: 610953211578

Related Categories

Benchmade Knives, Benchmade 940 / 943 / 9400 / 945 Osborne Folding Knives Series, MagnaCut Blade Steel, Aluminum Handle Material, Folding Knives, Folding Knives Automatic Knives, Made in USA, Warren Osborne

Badges

Product Clip Type Badge: Pocket Clip
Product Handle Badge: Aluminum Handles
Product Steel Type Badge: MagnaCut
Product Country of Origin Badge: Made in USA

Customer Reviews

Benchmade 9400BK-03 Osborne AUTO Folding Knife 3.4" CPM-MagnaCut Black DLC Battlewashed Plain Blade, Burnt Copper Aluminum Handlesrated 5.000 stars out of 5 (3 reviews)
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Benchmade 9400BK-03 Osborne AUTO Folding Knife 3.4" CPM-MagnaCut Black DLC Battlewashed Plain Blade, Burnt Copper Aluminum Handles
rated 5 stars out of 5
Rob
 Texas
Aug 21, 2025
Pros: Blade Material, Blade Sharpness, Ease of Opening, Handle Feel, Handle Material, Lock Ease of Use, Lock Type, Overall Quality, Pocket Clip, Sheath, Weight
Cons: None
Ride or Die Osborne – Perfection in Burnt Copper
Just unboxed the new 9400 with Burnt Copper aluminum scales and Magnacut, and it’s everything I hoped for and more. The blade came razor sharp out of the box, with a flawless grind and a smooth, confident snap when the auto fires. Absolutely zero blade play — it locks up like a vault. The ergonomics and balance make it an ideal EDC, and the Burnt Copper finish looks even better in person. Benchmade’s attention to detail shows in the perfect engraving and overall fit and finish. The Osborne design has always been iconic, but in this configuration it feels like the ultimate version. This is my ride-or-die knife — built to be carried for a lifetime
Benchmade 9400BK-03 Osborne AUTO Folding Knife 3.4" CPM-MagnaCut Black DLC Battlewashed Plain Blade, Burnt Copper Aluminum Handles
rated 5 stars out of 5
Matt
 maryland
Dec 27, 2024
Pros: Blade Material, Blade Sharpness, Ease of Opening, Handle Feel, Handle Material, Lock Ease of Use, Lock Type, Overall Quality, Weight
Cons: Pocket Clip, Sheath
Fast shipping
Bought priority shipping received in one day very fast. Good quality, solid lock up on the blade.
Benchmade 9400BK-03 Osborne AUTO Folding Knife 3.4" CPM-MagnaCut Black DLC Battlewashed Plain Blade, Burnt Copper Aluminum Handles
rated 5 stars out of 5
Steven
 Harrison Twp, Mi
Aug 19, 2024
Pros: None
Cons: Blade Material, Blade Sharpness, Ease of Opening, Handle Feel, Handle Material, Lock Ease of Use, Lock Type, Overall Quality, Pocket Clip, Weight
Osbornes
My 1 st knife was a 940-1 loved it now I step up to 9400bk-3 auto. Fantastic knifes both but love the snap so very much
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