CRKT Carson M21-14SF Special Forces Flipper Knife Aluminum (3.875" Black Serr)


  • Gray-finished, serrated spear point blade made from AUS-8 steel.
  • Kit Carson flipper tab and thumb studs for one-handed deployment.
  • Black aluminum handle and InterFrame construction.
  • Secure steel liner lock.
  • Four-way reversible pocket clip.


The CRKT M21 knife features a stainless steel InterFrame build with textured 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.

Item #BHQ-6703
MSRP: $149.95
Our Price: $92.95
In Stock!
Login to add items to your Wishlist


  • Overall Length: 9.25"
  • Blade Length: 3.875"
  • Blade Thickness: 0.14"
  • Blade Material: AUS-8
  • Hardness: 58-59 RC
  • Blade Style: Spear Point
  • Blade Grind: Hollow
  • Finish: Black
  • Edge Type: Serrated
  • Handle Length: 5.375"
  • Handle Thickness: 0.55"
  • Handle Material: Aluminum
  • Color: Black
  • Frame/Liner: Steel
  • Weight: 5.90 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: M21-14SF
  • Designer: Kit Carson
  • Country of Origin: Taiwan
  • Best Use: Everyday Carry
  • Product Type: Knife

Customer Reviews

Nice Knife
Cory B. on Oct 1, 2019

This was the second CRKT knife I bought. I love it. It has become part of my EDC in my gear bag.

Great Beater Knife
patrick g. on Oct 1, 2019

This is my most used EDC, largely because i don't mind scratching or abusing it. The steel is good enough, but dulls easier than a premium steel. I've used it as a pry bar and screw driver with no problems (fight me). Also, easy enough to operate one handed with practice. A solid beater, but missing better blade steel

Graham H. on Sep 27, 2020

Bought mine directly from CRKT. Best things about it are the look, feel, light weight (for it's size), and the extra handle length. CRKT appears to make knives that are somewhat budget friendly and I guess this qualifies based on its size and build quality. What don't I care for? Obviously, you don't want to carry this as and EDC. It's too scary looking. I'd rule that out unless you work in a shipping warehouse with other guys that regularly carry bigger knives. The flipper really doesn't reliably open the knife in one smooth action unless you want to apply some serious wrist action as you hit it. And I have to say that the safety release that you have to pull to unlock the knife is rather tedious. I always end up using two hands to make that happen and maybe that's the point. Either way, I don't care for it. The knife is impressive looking and it seems like it's built to last, but I do feel that I could find something easier to open and close for much the same price.

Blade HQ Copyright © 2023 Blade HQ. All rights reserved
Give Feedback