AR15: Mud Test

Published on January 7, 2016
Duration: 5:03

This guide details a rigorous mud test procedure for an AR-15, as demonstrated by InRangeTV. It covers initial function checks, extreme submersion in mud with both dust cover closed and open, and subsequent firing. The analysis highlights the AR-15's surprising resilience due to its tighter tolerances compared to firearms like the AK-47 in such harsh conditions.

Quick Summary

The AR-15 demonstrated remarkable reliability in a severe mud test, functioning flawlessly for 15 rounds despite being submerged and caked in mud. Its tighter tolerances, particularly when the bolt is forward, help seal the action against debris, outperforming firearms like the AK-47 in this specific scenario.

Chapters

  1. 00:12Introduction & Build Overview
  2. 01:03First Mud Test (Dust Cover Closed)
  3. 01:42Firing After Closed Cover Test
  4. 02:33Second Mud Test (Dust Cover Open)
  5. 03:01Firing After Open Cover Test
  6. 03:31Analysis and Conclusion

Frequently Asked Questions

How did the AR-15 perform in the mud test?

The custom AR-15 build, featuring a BCM upper and GWACS lower, performed exceptionally well in the mud test. It functioned flawlessly for 15 rounds across two phases, even when subjected to extreme mud submersion with the dust cover open.

What components were used in the custom AR-15 for the mud test?

The custom AR-15 build included a BCM upper receiver, a Spike's Tactical bolt carrier group, and a GWACS Armory CAV-15 MKII lower receiver with a USGI aluminum magazine. Karl Kasarda also wore Mechanix gloves during the test.

Why is the AR-15's design considered advantageous in muddy conditions?

The AR-15's tighter internal tolerances create a more sealed system when the bolt is forward. This design helps prevent mud and debris from easily entering critical moving parts, unlike firearms with larger operational gaps.

What was the most severe part of the mud test?

The most severe part of the test involved leaving the AR-15's dust cover open and shoveling mud directly into the ejection port and trigger area, simulating a highly contaminated internal environment before firing.

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