CRKT Carson M21-04G Big Dog Flipper Knife Black G-10 (3.875" Black)

Item #BHQ-4034
MSRP: $89.99
Our Price: $58.95
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  • Overall Length: 9.25"
  • Blade Length: 3.875"
  • Blade Thickness: 0.14"
  • Blade Material: Stainless Steel
  • Hardness: 58-59 RC
  • Blade Style: Spear Point
  • Blade Grind: Hollow
  • Finish: Gray
  • Edge Type: Plain
  • Handle Length: 5.375"
  • Handle Thickness: 0.55"
  • Handle Material: G-10
  • Color: Black
  • Frame/Liner: Steel
  • Weight: 6.00 oz.
  • User: Right Hand, Left Hand
  • Pocket Clip: Tip-Up, Tip-Down
  • Knife Type: Manual
  • Opener: Flipper, Thumb Stud
  • Lock Type: Liner Lock
  • Brand: CRKT
  • Model: M21
  • Model Number: M21-04G
  • Designer: Kit Carson
  • Country of Origin: Taiwan
  • Best Use: Everyday Carry
  • Product Type: Knife

  • Black-finished spear point blade made from stainless steel.
  • Kit Carson flipper tab and thumb studs for one-handed deployment.
  • Black G-10 scales over TFE-coated steel InterFrame.
  • Secure steel liner lock.
  • Four-way reversible pocket clip.


The CRKT M21 Big Dog knife features a stainless steel InterFrame build with textured black G-10 scales and a locking liner. CRKT's patented AutoLAWKS automatic safety turns this folder into a virtual fixed blade automatically. The M21 model features a removable stainless steel pocket clip. All fasteners, including the clip screws, are Torx.

CRKT Knives are high-quality for affordable prices! Shop our variety of CRKT folders, fixed blades, and more! You won't be disappointed.

Customer Reviews

Nice knife, pretty bulky
John S. on Jan 23, 2020

Flips well, absolutely love the blade shape. BUT this knife is much thicker and slightly heavier than its cousin the M16-04KS, which I greatly prefer for frequent carrying. Would love this blade shape on the M16! I'm also not a huge fan of the LAWKS system - seems redundant given the outstanding lock-up of the M16 and M21 and makes for annoying one handed closing. Still a cool knife, especially for large hands and frequent use. Edited: added a star, because the knife is great, just prefer M16.

Big dog
Ira L. on Jun 13, 2018

Absolutely love this pocket filling flipper. It's been carried many times with zero issues.

A Whole Lotta Love
Lyle C. on Aug 10, 2020

This is another big sucker. I bought this when I was just getting started on my path of knife acquisition and didn't quite know what I was doing. Which is to say be sure to check the measurements before you purchase this one, that aside I dig it. It's a nice addition to my collection which is comprised of a number of CRKT knives. I found pretty quickly they make good, solid, reliable blades at a reasonable price. I guess you could say this was an impulse buy. At this point I had gotten kind of carried away, but what the hell. It's a welcome addition to the family.

beast of a knife
james d. on Feb 27, 2020

ive owned this knife over 2 months I love it I have used it from the kitchen to work and its done everything i could ask for

Five Stars
Daniel S. on Jan 5, 2018

This is a big knife for edc but a great knife for the money. It’s built super solid. And I really like the secondary liner lock. I would buy this knife again.

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