Sig MPX meets the Gauntlet!

Published on October 23, 2020
Duration: 16:33

This video details a 'Gauntlet Test' performed on a second-generation Sig MPX 9mm PCC. The test involves submerging the firearm in water, sand, dirt, and mud, followed by firing. The MPX demonstrated significant sensitivity to water, failing to fire immediately after submersion and experiencing malfunctions when water was present in the barrel or gas system. While it performed well in other elements, its water vulnerability was highlighted as a key performance limitation.

Quick Summary

The Sig MPX 9mm PCC showed significant water sensitivity during a Gauntlet Test. Malfunctions occurred when the firearm was submerged or when water entered the barrel, impacting its gas piston system. While it performed well in sand, dirt, and mud, water ingress proved to be a critical vulnerability.

Chapters

  1. 00:00Introduction to the Sig MPX Gauntlet Test
  2. 00:35Explaining the Gauntlet and Elements Test
  3. 01:57Initial Function Check and Test Setup
  4. 02:44Sig MPX in Water: First Test
  5. 03:18Sig MPX in Sand
  6. 03:56Sig MPX in Dirt
  7. 04:20Sig MPX in Mud
  8. 04:40Rinsing and Resetting for Gauntlet
  9. 05:33Gauntlet Test: Port Cover Closed
  10. 06:10Gauntlet Test: Water Stage (Port Cover Closed)
  11. 06:45Gauntlet Test: Sand Stage (Port Cover Closed)
  12. 07:36Gauntlet Test: Mud Stage (Port Cover Closed)
  13. 08:22Cleaning and Preparing for Port Cover Open Test
  14. 08:44Gauntlet Test: Port Cover Open
  15. 09:10Gauntlet Test: Water Stage (Port Cover Open)
  16. 10:05Gauntlet Test: Dirt Stage (Port Cover Open)
  17. 10:34Gauntlet Test: Mud Stage (Port Cover Open)
  18. 11:01Final Thoughts on Gauntlet Test Results
  19. 11:37Total Failures Analysis
  20. 12:11Water Sensitivity Conclusion
  21. 13:11Post-Cleaning Water Sensitivity Test
  22. 14:31Further Water Ingress Testing
  23. 15:07Adding Water to Barrel: Test Setup
  24. 15:22One Tablespoon Water Test Results
  25. 15:45Malfunction with Water in Barrel
  26. 16:14Final Water Sensitivity Demonstration

Frequently Asked Questions

How did the Sig MPX perform in the Gauntlet Test's water stage?

The Sig MPX demonstrated significant issues in the water stage of the Gauntlet Test. It failed to fire immediately after submersion, experienced a 'dead trigger,' and had ejection failures. Even after cleaning, residual water in the barrel could cause malfunctions.

What is the primary cause of the Sig MPX's water-related malfunctions?

The malfunctions are attributed to the Sig MPX's gas piston system. Water ingress into the barrel or gas port can disrupt the cycling of the action, leading to failures to fire or eject, especially when the firearm is brought directly out of water.

Did the Sig MPX perform poorly in all elements of the Gauntlet Test?

No, the Sig MPX performed well in sand, dirt, and mud stages of the test, especially with its port cover closed. The controls remained functional, and the action did not appear significantly gummed up by these elements.

What was the outcome of testing the Sig MPX with a small amount of water in the barrel?

Introducing just a tablespoon of water into the Sig MPX's barrel, even after it had been out of water for some time, resulted in a 'click no bang' failure to fire, confirming its high sensitivity to water in the gas system.

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