Product Spotlight: The Brownells 733 Upper Receiver

Published on December 20, 2023
Duration: 2:27

This product spotlight from Brownells introduces the BRN-733 retro upper receiver, a Commando-style build. It highlights the unique C7 upper receiver, a Canadian contract variant by Colt that blends A1 and A2 features, specifically an A1 rear sight with an A2-style shell deflector. The build includes an 11.5-inch barrel with a non-F marked front sight post, a standard bird cage flash hider, and a 1:7 twist rate.

Quick Summary

The Brownells BRN-733 retro upper receiver is a Commando-style build featuring a unique C7 upper receiver, a Canadian contract variant by Colt that blends A1 rear sights with an A2 shell deflector. It includes an 11.5-inch barrel with a 1:7 twist, non-F marked front sight, and period-correct components like an elongated forward assist.

Chapters

  1. 00:00Introduction
  2. 00:03BRN-733 Upper Receiver Overview
  3. 00:26Understanding the C7 Upper Receiver
  4. 00:35C7 vs. A1/A2 Uppers
  5. 00:54Identifying the C7: Shell Deflector
  6. 01:08Barrel and Front Sight Details
  7. 01:13Flash Hider and Barrel Twist
  8. 01:22Retro Components: Slip Ring and BCG
  9. 01:37Bolt Carrier Group and Gas Key
  10. 01:45Charging Handle and Forward Assist
  11. 01:51Ideal for Commando Style Builds
  12. 02:00Questions and Contact Information

Frequently Asked Questions

What makes the Brownells BRN-733 upper receiver a 'retro' build?

The BRN-733 is a retro build because it utilizes a C7 upper receiver, a Canadian contract variant by Colt that blends features of the A1 and A2 receiver styles, offering a period-correct aesthetic for classic AR-15 configurations.

What are the key distinguishing features of a C7 upper receiver?

The C7 upper receiver is identifiable by its A1-style rear sight combined with an A2-style shell deflector. This combination is a hallmark of the Canadian contract uppers Colt produced.

What barrel specifications does the BRN-733 upper receiver feature?

The BRN-733 upper receiver is equipped with an 11.5-inch barrel that has a 1:7 twist rate. It also includes a non-F marked front sight post and a standard bird cage flash hider.

What internal components are highlighted on the BRN-733 upper receiver?

The BRN-733 upper receiver features a retro slip ring assembly, a phosphate chrome bolt carrier group, and a properly staked gas key, ensuring reliability and adherence to retro build standards.

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