Old Is New Again: Brownell's Retro ARs

Published on October 11, 2019
Duration: 17:43

This video from ARFCOM News explores Brownells' retro AR-15 and M16 rifle line, featuring insights from Caleb of Brownells. The discussion covers historical models like the Proto, 601, M16A1, and XM177, highlighting their distinctive features, service history, and design evolution. The video delves into technical aspects such as charging handles, furniture colors, bolt carrier finishes, receiver differences, flash hiders, and the concept of dwell time in gas-operated systems, offering a detailed look at these classic firearms.

Quick Summary

Brownells' retro AR-15 and M16 line offers historically accurate reproductions. Key models include the 601 with its triangle charging handle and gray furniture, and the M16A1, featuring a forward assist and birdcage flash hider. The XM177 carbine, designed for Special Forces, had a shorter barrel and a flash hider that functioned as a suppressor, requiring specific NFA compliance for modern versions.

Chapters

  1. 00:00Intro and Brownells Retro Line
  2. 00:43The Proto AR-15
  3. 01:18The Brownells 601 Retro Rifle
  4. 03:59Comparing 601 and M16A1 Features
  5. 05:11The M16A1: Vietnam Era Icon
  6. 06:09Bolt Carrier Group Finishes: Chrome vs. Phosphated
  7. 06:35Twist Rate: 1:12 for Retro Models
  8. 06:48The 605 Prototype and Dwell Time
  9. 08:49The Iconic XM177 Carbine
  10. 10:18XM177 vs. CAR-15
  11. 11:44Irony of Shorter Barrels and Suppressors
  12. 13:10Importance of Retro Part Accuracy
  13. 14:11Building a Retro AR: Then vs. Now
  14. 15:09Retro Rifles as Functional Art
  15. 15:22Shooting the Retro Rifles
  16. 16:56Outro and Final Thoughts

Frequently Asked Questions

What are the key differences between the Brownells 601 and M16A1 retro rifles?

The 601 retro rifle features Meg Pohl gray furniture and a triangle-shaped charging handle, with a chrome-plated bolt carrier group. The M16A1 adds a forward assist, a birdcage flash hider, and typically has a phosphated bolt carrier group, reflecting its later service period.

What is 'dwell time' in a gas-operated firearm system?

Dwell time is the duration from when the bullet passes the gas port until it exits the barrel. During this period, high-pressure gases act on the bolt carrier to cycle the action. Insufficient dwell time can lead to reliability issues, especially with shorter barrels.

Why was the original XM177 flash hider technically considered a suppressor?

The original XM177 flash hider was designed to reduce muzzle flash but also significantly reduced the firearm's report, leading the ATF to classify it as a silencer. This necessitated the use of pinned and welded flash hiders on modern reproductions to comply with NFA regulations.

What made building accurate retro AR-15s difficult before Brownells' retro line?

Before Brownells offered their retro line, sourcing authentic, period-correct parts like specific delta rings was extremely challenging and expensive. This made it difficult for enthusiasts to build highly accurate reproductions of historical AR-15 and M16 variants.

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