Stern AD9 Meltdown

Published on November 26, 2019
Duration: 44:59

Iraqveteran8888's Eric conducts an extreme endurance test on the Stern Defense AD9 9mm conversion kit for AR-15 platforms, pushing it to 6,064 rounds. The test highlights the kit's performance under heavy stress, detailing stoppages, field repairs, and the ultimate failure point, providing valuable insights for firearm enthusiasts and testers.

Quick Summary

The Stern Defense AD9 is a 9mm Luger conversion kit for AR-15 lower receivers, utilizing Glock 17/19 magazines. In an Iraqveteran8888 test, it endured 6,064 rounds in full-auto before a forward assist claw failure, with upper components remaining intact despite extreme heat. Geissele Go Juice was used as lubricant.

Chapters

  1. 00:00Introduction and Equipment Overview
  2. 02:00Meltdown Commencement and Initial Performance
  3. 05:38Technical Stoppages and Field Repairs
  4. 12:21Final Round Count and Failure Analysis

Frequently Asked Questions

What is the Stern Defense AD9?

The Stern Defense AD9 is a conversion kit designed to allow standard AR-15 lower receivers to fire 9mm Luger ammunition using Glock 17 or 19 magazines. It includes a dedicated upper assembly with a bolt, barrel, and charging handle.

How many rounds did the Stern Defense AD9 endure in the test?

The Stern Defense AD9 conversion kit was subjected to an extreme endurance test, reaching a final round count of 6,064 rounds fired in full-auto before a mechanical failure occurred.

What caused the Stern Defense AD9 to fail?

The ultimate failure of the Stern Defense AD9 during the endurance test was not a catastrophic barrel or bolt failure, but a mechanical issue with the forward assist claw, which became loose and jammed the action.

What type of lubricant was used in the Stern Defense AD9 endurance test?

During the high-round-count endurance test of the Stern Defense AD9, the firearm was lubricated using Geissele Go Juice, a specialized lubricant designed for high-performance firearms.

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