CRKT Carson M21, M18: Excellence Within Limits

Published on July 3, 2009
Duration: 20:09

This review of the CRKT M21 and M18 series highlights their strengths as EDC and tactical folders, while also detailing a failure during batoning due to a loose pivot screw. The presenter emphasizes the importance of Loctite on pivot screws for hard use and discusses blade steel, ergonomics, pocket clip design, and the liner lock mechanism with its auto-locks feature. The M18 is noted as a solid-handled alternative with a more versatile clip.

Quick Summary

The CRKT M21 series can fail under hard use like batoning if the pivot screw is not secured with Loctite, leading to handle looseness and liner lock compromise. For maximum strength, fixed blade knives are generally preferred over folders for survival or extreme tasks.

Chapters

  1. 00:16Initial Impressions & Early Use
  2. 01:50Batoning Failure & Analysis
  3. 02:42The Nutnfancy Project Introduction
  4. 03:04CRKT M21 Series Tabletop Review
  5. 04:03Pivot Screw Loosening Cause
  6. 05:23Irreparable Damage & Warranty
  7. 06:14Fixed Blade vs. Folder for Strength
  8. 07:05Overall Assessment: Heavy Duty Folder
  9. 07:37Blade Steel and Design (AUS8, Spear Point)
  10. 08:03Blade Modifications & Grinds
  11. 09:14Gimping and Thumb Traction
  12. 10:01Thumb Studs and Flipper Deployment
  13. 11:00Handle Ergonomics and Design
  14. 11:47M2102 (Smaller Model) EDC Suitability
  15. 12:10Pocket Clip Design and Options
  16. 13:34CRKT M1804K Variation Review
  17. 15:05M18 vs. M21 Comparison
  18. 15:36Liner Lock Mechanism Explained
  19. 16:13Auto-Locks Feature
  20. 17:27Pivot Screw Adjustments
  21. 17:44Deployment Sound and Lockup
  22. 18:07Weight and Blade Steel Recap
  23. 18:40Pros and Cons Summary
  24. 19:30Overall Verdict and Value

Frequently Asked Questions

What caused the CRKT M21 knife to fail during batoning?

The CRKT M21 failed during batoning primarily because the pivot screw loosened significantly. This allowed the handle halves to come apart, compromising the dimensional consistency critical for the liner lock to function correctly, ultimately leading to the liner bending.

What is the recommended steel for the CRKT M21 and M18 series knives?

Both the CRKT M21 and M18 series knives reviewed feature AUS8 stainless steel for their blades. This steel is considered good for everyday carry and tactical use, offering a balance of toughness, edge retention, and corrosion resistance, though it's not the most rust-resistant option available.

How does the CRKT M18 compare to the M21 series?

The CRKT M18, like the M1804K, is a solid-handled aluminum folder, contrasting with the M21's milled-out design. While the M21 offers more versatile pocket clip options, the M18's solid handle is less prone to gunk accumulation, and its fixed clip is still functional, making it a strong value proposition.

What is the 'auto-locks' feature on the CRKT M21?

The 'auto-locks' feature on the CRKT M21 is a mechanism designed to prevent the liner lock from accidentally closing against the blade tang. It acts as a secondary safety, enhancing the security of the lock-up, though its spring can be removed for manual engagement if desired.

What are the main advantages and disadvantages of the CRKT M21 series?

Advantages of the CRKT M21 include its good looks, value for money, AUS8 blade steel, fast flipper deployment with an authoritative sound, and strong tip. Disadvantages include its weight, potentially weak liner lock under extreme stress, and an open handle design that can collect debris.

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