AR15 hasn't been cleaned for 7,000 rounds! Can it make it to 10k rounds?

Published on July 5, 2021
Duration: 15:49

This video details a long-term reliability test of a BCM AR-15 subjected to 7,580 rounds without cleaning or lubrication, aiming for 10,000 rounds. Expert analysis from Military Arms Channel highlights the direct impingement system's resilience, even with significant carbon fouling and gas port erosion, challenging common misconceptions about DI rifle reliability. The test demonstrates the potential for sustained function under extreme conditions.

Quick Summary

A BCM AR-15 was subjected to 7,580 rounds without cleaning or lubrication, demonstrating the reliability of its direct impingement system. Despite significant carbon fouling and observed gas port erosion, the rifle continued to function without malfunctions, challenging common misconceptions about DI AR-15s.

Chapters

  1. 00:00Introduction to the 10k Round Reliability Test
  2. 02:27Resuming the Test and Initial Inspection
  3. 03:56Accuracy and Reliability Testing
  4. 08:21Borescope Inspection and Gas Port Erosion
  5. 11:38Test Results and DI vs. Piston Discussion

Frequently Asked Questions

How many rounds did the BCM AR-15 fire without cleaning in the test?

The BCM AR-15 was tested with 7,580 rounds fired without any cleaning or lubrication. The initial goal was to reach 10,000 rounds to demonstrate the reliability of the direct impingement system under extreme conditions.

What internal wear was observed on the AR-15 during the test?

Borescope inspection revealed significant gas port erosion and 'gatoring' near the chamber lead after 7,580 rounds. This indicated the rifle was becoming over-gassed but continued to function without malfunctions.

Are Direct Impingement (DI) AR-15s unreliable when dirty?

The test suggests that modern DI AR-15s are highly refined and can be very reliable even when heavily fouled. The speaker argues against the common misconception that DI systems are inherently less reliable than piston systems when dirty.

What ammunition and magazines were used in the test?

The test utilized Federal American Eagle .223 Remington 55 Grain FMJ ammunition. Lancer 30-round magazines were also employed during the high-volume firing segments of the reliability test.

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