Customer Build: Jennifer Williams Competition AR15

Published on July 7, 2025
Duration: 91:04

This video provides a comprehensive, step-by-step guide to building a competition AR-15 rifle, starting from individual components. It covers the installation of lower receiver parts, including the trigger, hammer, and selector, followed by the assembly of the upper receiver, barrel, handguard, and gas system. The guide also details the mounting of an optic and accessories, emphasizing proper torque values and techniques for a reliable and accurate firearm suitable for competition.

Quick Summary

Building a competition AR-15 involves installing components like the Radian receiver set, Guesley trigger, and Leupold optic. Key steps include proper torqueing of the barrel nut to 65 ft-lbs and ensuring muzzle device compliance by pinning and welding to achieve a 16-inch minimum barrel length.

Chapters

  1. 00:07Introduction & Build Goal
  2. 00:14Customer Build Overview
  3. 01:11Radian Receiver Set & Handguard
  4. 02:11Lower Receiver Assembly: Trigger & Hammer
  5. 10:30Selector Lever Installation
  6. 17:16Grip Installation
  7. 23:16Receiver Extension & Buffer System
  8. 33:41Stock Installation
  9. 36:09Upper Receiver & Barrel Installation
  10. 44:30Gas Block & Gas Tube Installation
  11. 55:24Handguard Installation
  12. 61:25Muzzle Device Installation & Pin/Weld
  13. 65:20Optic Mounting: Leupold Mark 5 HD
  14. 84:56Accessory Installation: Tiger Claw Grip
  15. 87:04Accessory Installation: Magpul Rail Panels
  16. 89:41Final Touches & Range Prep
  17. 90:24Conclusion & Congratulations

Frequently Asked Questions

What are the key components for building a competition AR-15?

A competition AR-15 build typically involves a Radian receiver set, Guesley trigger, BCM recoil mitigation system, Magpul SLS stock, Sons of Liberty bolt carrier group, Leupold Mark 5 HD optic, and a Surefire muzzle brake. Proper tools and lubricants are also essential for assembly.

How do you properly install a trigger and hammer in an AR-15 lower receiver?

Install the trigger using a slave pin to hold the disconnector. Insert the trigger and then the retaining pin, starting with the smooth side. For the hammer, ensure legs face correctly and use a nylon-tipped punch to align and insert the hammer pin.

What is the correct torque specification for an AR-15 barrel nut?

The barrel nut should be torqued to 65 ft-lbs. It's recommended to torque it, then loosen, and retorque to ensure all threads are properly engaged and the barrel is securely seated.

How do you ensure a muzzle device is legally compliant on a short-barreled AR-15?

For barrels under 16 inches, a muzzle device must be pinned and welded to a spacer or extension to achieve a minimum legal barrel length of 16 inches. This process ensures compliance with Federal/NFA regulations.

What is the recommended torque for mounting an AR-15 optic?

When mounting an AR-15 optic, the scope ring screws should be torqued to 28 inch-lbs. It's crucial to use a torque wrench and tighten in a star pattern for even pressure and secure mounting.

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