PSA CHF M4 Upper Meltdown!

Published on December 26, 2017
Duration: 11:13

This video details a destructive meltdown test on a Palmetto State Armory CHF M4 Upper receiver chambered in 5.56 NATO. Conducted by Iraqveteran8888, the test pushes the upper to its limits via continuous full-auto fire, monitoring heat with thermal imaging. The analysis, performed with high authority and detailed knowledge of metallurgy and AR-15 dynamics, reveals the barrel's robust construction from 'machine gun steel' and identifies the gas tube as the primary failure point at 430 rounds, acting as a safety fuse. The expert assessment highlights the importance of gas tube material selection for extreme use and suggests future testing with upgraded components.

Quick Summary

The Palmetto State Armory CHF M4 Upper, featuring an FN Cold Hammer Forged barrel made from 'machine gun steel,' survived 430 rounds of continuous full-auto fire. The test, conducted by Iraqveteran8888, revealed the barrel's exceptional durability, with no warping or damage. The failure occurred at the standard gas tube, which ruptured, acting as a safety fuse.

Chapters

  1. 00:00Introduction to PSA CHF M4 Upper
  2. 01:13Barrel Specs and Test Setup
  3. 02:51The Meltdown Test Begins
  4. 05:06Failure and Initial Assessment
  5. 06:05Post-Meltdown Inspection
  6. 08:27Future Testing & Gas Tube Materials

Frequently Asked Questions

What is the durability of the Palmetto State Armory CHF M4 Upper under extreme conditions?

The Palmetto State Armory CHF M4 Upper, featuring an FN Cold Hammer Forged barrel made from 'machine gun steel,' demonstrated significant durability by surviving 430 rounds of continuous full-auto fire before the gas tube failed. The barrel itself showed no warping or damage.

What caused the failure in the PSA CHF M4 Upper during the meltdown test?

The primary failure point was the standard gas tube, which ruptured and separated from the gas block at approximately 430 rounds. This component acted as a 'fuse,' stopping the system before the barrel experienced catastrophic failure.

What materials are used in the PSA CHF M4 Upper's barrel, and why is this significant?

The barrel is constructed from 'machine gun steel,' comparable to alloys used in M249 and M240 machine guns. This material choice contributes to its exceptional durability and resistance to warping or damage even under extreme heat generated during rapid fire.

What are the implications of the gas tube failure for AR-15 users?

The test highlights that standard gas tubes can be a weak link under sustained full-auto fire. Upgrading to more heat-resistant materials like Inconel for the gas tube is recommended for high-stress applications to prevent premature failure.

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