AR-15 Reliability Demonstration

Published on September 28, 2012
Duration: 9:09

This AR-15 reliability demonstration focuses on the Colt LE6920's performance under extreme dirt contamination. The test simulates real-world scenarios by introducing dirt into the magazine, action, and bolt carrier group. While the rifle shows impressive resilience, significant debris in the trigger group can cause malfunctions, highlighting the importance of proper maintenance and the AR-15's sealed system.

Quick Summary

The AR-15's sealed system protects against external dirt, but internal contamination, particularly in the trigger group, can cause malfunctions like trigger reset failure. Even a dirty bolt carrier group allowed the rifle to cycle, albeit sluggishly.

Chapters

  1. 00:10Intro & Rifle Specs: Colt LE6920
  2. 00:45Dirty Ammo & Magpul PMAG Test
  3. 01:48External Dirt Test (Dust Cover Open)
  4. 03:00Dirt in Magazine Reliability
  5. 05:20Dirt in Action & Trigger Group Failure
  6. 07:20Extreme Bolt Carrier Group Dirt Test

Frequently Asked Questions

How does the AR-15's sealed system perform against dirt?

The AR-15's sealed system offers good protection against external dirt, even with the dust cover open. However, significant internal contamination, especially within the action and trigger group, can lead to malfunctions like trigger reset failures.

Can dirt in the magazine affect AR-15 reliability?

In this test, pouring dirt directly into a Magpul PMAG did not cause feeding issues. The rifle successfully cycled all rounds, demonstrating the PMAG's resilience and the AR-15's ability to handle some magazine debris.

What happens if dirt gets into the AR-15's trigger group?

If dirt contaminates the AR-15's fire control group, it can interfere with the mechanism, potentially causing malfunctions such as a failure to reset the trigger, requiring manual intervention to fire the next round.

Does a dirty bolt carrier group stop an AR-15 from working?

Even when the bolt carrier group was heavily soiled with dirt and quickly reassembled, the AR-15 was still able to cycle the remaining rounds, although it operated with noticeable sluggishness.

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