Bufferless AR Pistol Build: 3 UNEXPECTED Failures You Need to See

Published on December 18, 2019
Duration: 15:57

This build review highlights three unexpected failures with a bufferless AR pistol using the Brownells BRN-180S: a loose handstop, a folding brace collapsing mid-fire, and a loosening flash hider due to the jam nut system. Despite these issues, the rifle demonstrated 100% cycling reliability over 550 rounds and offers a clean-shooting piston system with excellent ergonomics, though it runs hot and has increased recoil.

Quick Summary

A bufferless AR pistol build using the Brownells BRN-180S experienced three key failures: a loose handstop, a folding brace collapsing mid-fire, and a loosening flash hider. Despite these, the build showed 100% cycling reliability over 550 rounds.

Chapters

  1. 00:00Intro: Bufferless AR Pistol Build
  2. 00:33Failure 1: Loose Handstop
  3. 00:55Failure 2: Folding Brace Malfunction
  4. 01:31Failure 3: Loose Flash Hider
  5. 02:22Troubleshooting & Adjustments
  6. 03:22Second Range Trip Results
  7. 05:35Reliability & Magazine Testing
  8. 06:49Piston System Pros & Cons
  9. 08:35Ergonomics & Manual of Arms
  10. 09:41Dust Cover & Receiver Wear
  11. 10:43Final Verdict & Value

Frequently Asked Questions

What were the main failures encountered with the bufferless AR pistol build?

The build experienced three main failures: a loose handstop, the folding brace unexpectedly collapsing mid-fire, and the three-prong flash hider loosening due to the jam nut system. These issues highlight potential challenges with non-standard components and assembly.

How reliable was the BRN-180S bufferless AR pistol build?

Despite initial component failures, the build demonstrated excellent reliability, achieving 100% cycling over 550 rounds with various magazines (.223 and 5.56 NATO). This indicates the core piston system is robust.

What are the pros and cons of the BRN-180S short-stroke piston system?

The BRN-180S keeps the bolt and chamber very clean. However, it vents gas into the handguard, causing it to get hot quickly, and produces more felt recoil than a direct impingement system.

Is the Brownells BRN-180S bufferless AR pistol build recommended?

Yes, despite the initial failures, the host recommends the build. The $850 MSRP is considered justified by the custom, non-standard parts required for the unique bufferless piston design.

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