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 BCM AR15 successfully reached 7,580 rounds without cleaning or lubrication, demonstrating the reliability of direct impingement systems. Despite significant carbon fouling and observable gas port erosion, the rifle experienced zero malfunctions. The test highlights that modern DI AR15s can be highly reliable even under extreme neglect, challenging the notion that piston systems are inherently superior for reliability.

Quick Summary

A BCM AR15 successfully completed a reliability test firing 7,580 rounds without cleaning or lubrication. Despite heavy carbon fouling and gas port erosion, the rifle experienced zero malfunctions, demonstrating the robustness of modern direct impingement systems.

Chapters

  1. 00:00Intro: 7,080 Rounds Uncleaned AR15 Test
  2. 02:27Resuming Test & Initial Inspection
  3. 03:56Accuracy & High-Volume Fire Test
  4. 08:21Borescope: Gas Port Erosion Analysis
  5. 11:38Test Results: DI vs. Piston Reliability

Frequently Asked Questions

How many rounds did the BCM AR15 fire without cleaning in the test?

The BCM AR15 was tested for reliability over 7,580 rounds without any cleaning or lubrication. The test aimed to push the rifle to 10,000 rounds but concluded at 7,580 due to the observed wear.

What is gas port erosion and is it bad for an AR15?

Gas port erosion is wear around the gas port, common in high-round count direct impingement rifles. While it can cause the rifle to become over-gassed, as seen in this test, it did not lead to any malfunctions, indicating continued reliability.

Are direct impingement AR15s unreliable when dirty?

This test suggests modern direct impingement AR15s are highly reliable even when heavily fouled. The BCM rifle fired over 7,500 rounds without cleaning and experienced zero malfunctions, challenging the notion that DI systems require constant maintenance.

What was the condition of the BCM AR15 after 7,580 rounds without cleaning?

After 7,580 rounds, the BCM AR15 showed significant carbon fouling on the bolt carrier group and noticeable gas port erosion. Despite this, the rifle functioned flawlessly with zero malfunctions throughout the extreme reliability test.

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