Product Spotlight: SOLGW / Geissele 13.7" AR-15 Upper

Published on November 25, 2021
Duration: 6:47

This product spotlight from Brownells features a collaborative AR-15 upper from Sons of Liberty Gun Works (SOLGW) and Geissele. The build centers around a 13.7" SOLGW barrel, chosen for optimal mid-gas system dwell time, paired with a Geissele Mark 8 rail and receiver. Key components include a SOLGW BCG and Radian Raptor charging handle, with the SOLGW KNOX muzzle device serving as a flash hider, climb mitigator, and Dead Air suppressor host, bringing the barrel assembly to legal length. The presentation highlights the robust construction and data-driven design philosophy of both brands.

Quick Summary

The SOLGW/Geissele 13.7" AR-15 upper features a 13.7" barrel for optimal mid-gas dwell time and legal compliance with longer muzzle devices. It includes a Geissele Mark 8 rail, SOLGW BCG, and the KNOX muzzle device for flash/climb mitigation and suppressor hosting.

Chapters

  1. 00:00Introduction: SOLGW/Geissele Collaboration
  2. 00:11Product Overview: Key Components
  3. 00:42Geissele Mark 8 Rail Spotlight
  4. 00:58Charging Handle & SOLGW BCG
  5. 01:17Brand Philosophies: SOLGW & Geissele
  6. 01:3413.7" Barrel Rationale Explained
  7. 02:32Shooting Characteristics & Gas System
  8. 02:51SOLGW KNOX Muzzle Device Features
  9. 03:44Suppressor Compatibility: KNOX Device
  10. 04:06SOLGW Barrel Specifications
  11. 04:25Gas Block & Tube Integration
  12. 04:57SOLGW BCG Design Philosophy
  13. 05:37Project Wrap-up & Special Offering
  14. 06:00Customer Reception & Rarity
  15. 06:21Closing Remarks

Frequently Asked Questions

What is the primary advantage of the 13.7" barrel length on this AR-15 upper?

The 13.7" barrel is the shortest practical length for a mid-gas system, ensuring adequate dwell time for reliable operation. It also allows for longer muzzle devices to be attached without making the overall firearm exceed 16 inches, thus avoiding NFA regulations.

What is the function of the SOLGW KNOX muzzle device on this upper?

The SOLGW KNOX muzzle device extends the 13.7" barrel to the legal 16" length. It also mitigates muzzle climb, reduces flash, and serves as a suppressor host compatible with Dead Air KeyMod systems.

What makes the Geissele Mark 8 rail significant in this build?

The Geissele Mark 8 rail was specifically brought back into production for this collaborative project. It is noted for its heavy-duty construction and represents a rare opportunity for builders to acquire this particular rail.

What is the design philosophy behind the SOLGW bolt carrier group (BCG) used in this upper?

SOLGW prioritizes robustness and reliability in their BCG design, considering it the 'heart of the rifle.' The focus is on durable, functional components rather than aesthetic features.

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