Sig MCX Torture Test!

Published on December 31, 2015
Duration: 28:08

This Sig MCX torture test subjected the 5.56mm rifle to a rigorous mud and grit challenge. While initially reliable, the rifle experienced significant cycling failures when exposed to mud with the dust cover open, attributed to grit entering the tight dual recoil spring channels. After thorough cleaning and lubrication, the MCX returned to full functionality, proving to be accurate and ergonomic but sensitive to extreme environmental contamination.

Quick Summary

The Sig MCX 5.56mm rifle experienced cycling failures in a mud torture test due to grit entering its tight dual recoil spring channels. After a thorough cleaning and lubrication, the rifle returned to 100% functionality, proving it's accurate and ergonomic but sensitive to extreme environmental contamination.

Chapters

  1. 00:00Intro: Sig MCX Torture Test
  2. 00:41Test Setup & Ammo
  3. 01:20Mud Stomp Test Begins
  4. 02:24Internal Design & Grit Concerns
  5. 03:15Open Action Mud Test Failures
  6. 05:26Field Strip & Inspection
  7. 09:10Magazine Compatibility Test
  8. 13:18Final Cleaning & Conclusion

Frequently Asked Questions

How did the Sig MCX perform in the mud torture test?

The Sig MCX initially performed well but experienced significant cycling failures when exposed to mud, especially with the dust cover open. Grit entered its tight recoil spring channels, causing friction. After cleaning, it returned to full function.

What caused the Sig MCX to fail during the mud test?

The primary cause was fine grit entering the dual recoil spring channels in the upper receiver, creating friction that hindered bolt velocity and caused short-stroking. This sensitivity is due to the MCX's tight internal tolerances.

Can the Sig MCX be fixed after being exposed to mud?

Yes, after a thorough field strip, cleaning, and lubrication with CLP, the Sig MCX returned to 100% functionality. This indicates that proper maintenance can restore performance after environmental contamination.

Is the Sig MCX suitable for harsh environments?

While accurate and ergonomic, the Sig MCX's tight tolerances make it sensitive to water and fine silt. It requires diligent cleaning after exposure to harsh conditions, suggesting it may not be the ideal choice for extreme, low-maintenance environments.

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