1st Look: BRN-180 in 7.62x39 and the DrOP

Published on August 2, 2022
Duration: 13:41

This video provides a first look at the Brownells BRN-180 upper receiver chambered in 7.62x39. The review details a cold start test, highlighting potential reliability issues such as extraction failures, and explores troubleshooting steps including adjusting gas settings and trying different lower receivers. It also touches on the use of budget optics and specialized magazine pouches.

Quick Summary

The Brownells BRN-180 upper receiver in 7.62x39, based on the AR-180 piston system, was tested for reliability. Initial cold start tests revealed extraction failures, possibly due to insufficient lower receiver spring power or firing pin length. Troubleshooting involved adjusting gas settings and trying different lower receivers.

Chapters

  1. 00:06Introduction & New Gear
  2. 00:10Brownells BRN-180 Introduction
  3. 01:03BRN-180 Disassembly
  4. 01:35BRN-180 in 7.62x39
  5. 01:46Partnership with PWS & AR-180 Design
  6. 02:20Mounting a Budget Optic
  7. 02:42Pinty Red Dot Review
  8. 03:37Preparing for Cold Start Test
  9. 04:22Ridgeline DrOP Magazine Pouch
  10. 05:31Magazine Pouch Mounting
  11. 06:09Loading Mags & Cold Start Prep
  12. 06:167.62x39 Cold Start Test Begins
  13. 07:05Initial Stoppage Observed
  14. 07:24Troubleshooting Extraction Issues
  15. 08:13Second Test with Different Lower
  16. 08:18Geissele Trigger Lower
  17. 08:30Second Cold Start Attempt
  18. 10:30Assessing Spring Action & Suppressed Setting
  19. 10:43Optic Offset Observations
  20. 11:45Bench Testing & Zeroing
  21. 12:21Zero Achieved, Troubleshooting Continues
  22. 12:45Removing BRN-180 Due to 'Blastiness'
  23. 12:51Suppressor Installation
  24. 13:06Future Review & Final Thoughts

Frequently Asked Questions

What is the Brownells BRN-180 in 7.62x39?

The Brownells BRN-180 is an upper receiver assembly, modeled after the AR-180 piston system, now available in 7.62x39 caliber. It expands on earlier versions offered in 5.56 and .300 Blackout, providing a different caliber option for AR-style platforms.

What issues were encountered during the BRN-180 7.62x39 cold start test?

During the cold start test, the BRN-180 in 7.62x39 experienced extraction failures. Potential causes discussed include insufficient spring power in the lower receiver or a firing pin that is not long enough to properly ignite the primer.

What is the Ridgeline DrOP and its purpose?

The Ridgeline DrOP (Drop Offset Pouch) is a magazine pouch designed to position magazines away from the body. This offset design aids in quicker and easier magazine access, particularly beneficial when wearing body armor or for individuals who may have difficulty reaching directly to their belt.

What are the considerations for using a budget optic on a firearm like the BRN-180?

Using a budget optic, like the Pinty Red Dot tested, means compromising on materials (e.g., not aerospace aluminum) and potentially durability. While functional for initial testing, such optics may not withstand heavy use or harsh conditions as well as higher-end alternatives.

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