AR15: Mud Test

Published on January 7, 2016
Duration: 5:03

This AR-15 mud test demonstrates the rifle's surprising resilience to extreme contamination. Even when subjected to heavy mud ingress with the dust cover open, the custom-built AR-15 functioned flawlessly for ten rounds, only failing to lock open on the last round due to mud affecting the bolt catch. The analysis suggests the AR-15's tight tolerances contribute to its resistance against debris.

Quick Summary

This AR-15 mud test demonstrated remarkable resilience. Even with mud directly entering the action through an open dust cover, the rifle fired ten rounds flawlessly, only failing to lock open due to mud on the bolt catch. The analysis suggests tight tolerances help keep debris out.

Chapters

  1. 00:12AR-15 Build & Initial Function Check
  2. 01:03First Mud Test (Dust Cover Closed)
  3. 01:42Firing After Closed Cover Mud Test
  4. 02:33Second Mud Test (Dust Cover Open)
  5. 03:01Firing After Open Cover Mud Test
  6. 03:31Analysis: AR-15 vs. AK-47 in Mud

Frequently Asked Questions

Can an AR-15 function after being covered in mud?

Yes, this AR-15 mud test showed the rifle functioned flawlessly for ten rounds even after mud was shoveled directly into the action with the dust cover open. It only failed to lock open on the last round due to mud affecting the bolt catch.

How does the AR-15's design handle mud compared to an AK-47?

The AR-15's tight internal tolerances are suggested to help keep debris out of critical moving parts, acting like a sealed system when the bolt is forward. This contrasts with the AK-47's larger gaps, which can allow more mud ingress.

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

The custom AR-15 build featured a BCM upper receiver, a Spike's Tactical bolt carrier group, and a GWACS Armory CAV-15 MKII lower receiver with a USGI trigger group.

What was the most severe part of the AR-15 mud test?

The most severe test involved leaving the AR-15's dust cover open and shoveling mud directly into the ejection port and trigger area. Despite this extreme contamination, the rifle still cycled and fired ten rounds.

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