13.7" Do it all AR15 (Sons of Liberty Gun works AR15)

Published on September 17, 2019
Duration: 27:25

This guide details the process of building a versatile 13.7-inch AR-15, focusing on achieving a legal 16-inch overall length via pin-and-weld muzzle devices. It covers component selection, installation of key parts like the SOLGW M76 rail and Vltor A5 buffer system, and accessory mounting. The build emphasizes modularity and performance, drawing on expertise from Garand Thumb's technical evaluation.

Quick Summary

The 13.7-inch AR-15 platform, when paired with a pinned and welded muzzle device to achieve a 16-inch legal barrel length, offers superior maneuverability compared to standard 14.5-inch builds without NFA restrictions. This versatile configuration, as detailed by Garand Thumb, balances compactness with compliance, making it an excellent "do-it-all" rifle choice.

Chapters

  1. 00:00Introduction and Shooting Montage
  2. 02:18The 13.7-inch AR-15 Concept
  3. 05:33Muzzle Device: SOLGW NOX
  4. 07:47Barrel Specifications and Accuracy
  5. 08:58Gas System and Reliability
  6. 11:13Rail System: SOLGW M76
  7. 13:37Receivers and Internal Components
  8. 16:52Buffer System and Furniture
  9. 22:46Accessories and Optics
  10. 26:33Conclusion and Training

Frequently Asked Questions

What makes a 13.7-inch AR-15 a "do-it-all" rifle?

A 13.7-inch AR-15 is considered a "do-it-all" rifle because it achieves a legal 16-inch overall barrel length when a muzzle device is pinned and welded. This offers enhanced maneuverability over standard 14.5-inch builds without NFA restrictions, making it suitable for various roles from home defense to range use.

How does the SOLGW NOX muzzle device improve performance?

The SOLGW NOX muzzle device is a three-prong design that offers excellent compensation and flash suppression. It's engineered to minimize the 'ringing' sound often associated with similar designs and is compatible with Dead Air suppressors, providing versatility for different shooting scenarios.

Why is the Vltor A5 buffer system recommended for this build?

The Vltor A5 buffer system is recommended for its ability to smooth out the recoil cycle. By using a rifle-length spring within a carbine-length receiver extension, it provides a more controlled and comfortable shooting experience, reducing felt recoil and improving follow-up shots.

What are the key features of the SOLGW M76 rail?

The SOLGW M76 rail is designed for weight savings and improved ergonomics. It features M-LOK slots at the front for mounting accessories like lights and lasers, while omitting them in the middle section. It utilizes a robust wedge-lock design for secure barrel nut attachment.

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