Least Reliable AR-15 Yet?

Published on January 25, 2015
Duration: 43:04

This LaRue Tactical 20-inch Stealth Upper, despite its high cost and multiple returns to the manufacturer, exhibited severe reliability issues, particularly in cold weather. The speaker, Nutnfancy, documented a six-year saga of failures, ultimately resolving the chronic under-gassing by manually enlarging the gas port. While exceptionally accurate once functional, the extensive user intervention required makes it a questionable value compared to more affordable, reliable alternatives.

Quick Summary

The LaRue Tactical 20-inch Stealth Upper suffered from chronic under-gassing, leading to short-stroking and feeding failures, especially in cold weather. After six years and multiple manufacturer returns, the issue was resolved by manually enlarging the gas port, achieving 100% reliability and sub-MOA accuracy.

Chapters

  1. 00:00Field Failure in Winter Conditions
  2. 02:56The Six-Year Reliability Saga
  3. 06:52Troubleshooting and Manufacturer Returns
  4. 11:15The DIY Solution: Drilling the Gas Port
  5. 14:49Velocity and Barrel Length Philosophy
  6. 18:09Competitive Options and Custom Builds
  7. 21:18Final Accuracy Results and Conclusion

Frequently Asked Questions

What were the main reliability issues with the LaRue Tactical 20-inch Stealth Upper?

The primary issues were repeated short-stroking and failures to feed, particularly in cold and snowy conditions. Despite multiple returns to LaRue, the rifle remained unreliable until the gas port was manually enlarged.

How did Nutnfancy eventually fix the reliability problems with the LaRue Stealth Upper?

After years of troubleshooting and manufacturer returns, Nutnfancy manually drilled out and enlarged the gas port on the barrel. This modification corrected the chronic under-gassing and resulted in 100% reliability.

Was the LaRue Stealth Upper accurate despite its reliability issues?

Yes, once the reliability issues were resolved through gunsmithing, the LaRue Stealth upper proved to be exceptionally accurate. It achieved sub-MOA groups at 100 yards and a 4.3-inch group at 450 yards with 77-grain ammunition.

What alternatives does Nutnfancy suggest to the expensive LaRue upper?

He suggests considering more budget-friendly options like the Rock River Arms R3 Competition upper or building a custom upper from quality components, which can offer similar accuracy and better reliability for less cost.

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