Brownells BRN-180: What You Need to Know | Gun Talk Videos

Published on December 11, 2022
Duration: 4:33

This guide details the assembly of the Brownells BRN-180 lower receiver, highlighting its unique features compared to standard AR-15 lowers. It covers the installation of the magazine catch, takedown pin, selector, and grip, including a common modification for the selector spring length. The process concludes with mounting a Brownells folding stock.

Quick Summary

The Brownells BRN-180 lower receiver distinguishes itself from standard AR-15 lowers through its billet machining, eliminating the need for a buffer tube extension for folding stocks. It features a solid pin for the magazine catch and a unique takedown pin channel orientation. Assembly may require trimming the selector spring for easier installation.

Chapters

  1. 00:01Introduction to BRN-180 Lower
  2. 00:15Billet Machined Receiver Features
  3. 00:26Magazine Catch Installation
  4. 00:45Buffer Tube Elimination
  5. 01:06Takedown Pin Orientation
  6. 01:44Selector Spring Modification
  7. 02:17Safety Selector Installation
  8. 03:09Grip and Spring Pinning
  9. 03:29Function Checks
  10. 03:46Folding Stock Mounting
  11. 04:08Conclusion: BRN-180 Lower Recap

Frequently Asked Questions

What makes the Brownells BRN-180 lower receiver different from a standard AR-15 lower?

The BRN-180 lower is billet machined and lacks a buffer tube threaded extension, allowing for folding stocks. It also uses a solid pin for the magazine catch and has a different orientation for the takedown pin channel.

How is the magazine catch installed on the BRN-180 lower receiver?

Instead of a roll pin, the BRN-180 lower is drilled and tapped for a solid pin, making installation easier with just a hex wrench.

What modification might be needed for the selector spring on a BRN-180 lower?

The selector spring can be quite long. A common modification is to trim approximately 3/16 of an inch off the spring to make it easier to capture during grip installation.

Can I use a standard AR-15 buffer tube with the BRN-180 lower receiver?

No, the BRN-180 lower receiver is specifically designed without a buffer tube threaded extension, enabling the direct attachment of folding stocks.

Related News

All News →

More Gunsmithing & DIY Videos You Might Like

More from Gun Talk Media

View all →