C5 Side Charging | Bobro Engineering QD | Rugged Obsidian 9

Published on May 4, 2020
Duration: 14:07

This video details a custom AR-15 build inspired by the MP5 platform, utilizing a New Frontier Armory C5 side-charging upper and an 8-inch 9mm barrel. The build incorporates an SB Tactical PDW brace, Geissele rail, and a tri-lug adapter for easy suppressor and muzzle device changes. The presenter highlights the functionality of the Bobro Engineering QD mount and the Modlite system, emphasizing momentary-only light activation for tactical applications. The build was tested with KCI magazines and PMC ammunition, experiencing no malfunctions.

Quick Summary

This custom AR-15 build is inspired by the MP5 aesthetic, featuring a New Frontier Armory C5 lower receiver that accepts MP5 magazines. Key components include a side-charging upper, an 8-inch 9mm barrel, a tri-lug adapter for quick suppressor changes, and a Holosun HS503CU optic mounted on a Bobro Engineering QD mount. The build emphasizes functional gear choices like the Modlite Mod button with momentary-only activation.

Chapters

  1. 00:37Introduction and C5 Lower Overview
  2. 01:08Previous C5 Lower Issues and Fixes
  3. 02:04Range Day Performance and Ammunition
  4. 02:23Build Breakdown: C5 Lower and MP5 Aesthetic
  5. 02:55Side Charging Upper and PDW Brace
  6. 03:09Geissele Rail, 9mm Barrel, and Tri-Lug Adapter
  7. 03:25Muzzle Device, Diopter Sights, and MP5 Look
  8. 03:31Why Not Just Buy an MP5?
  9. 03:58Holosun HS503CU Optic Review
  10. 04:29Bobro Engineering QD Mount
  11. 04:56Modlite Mod Button and OKW Light
  12. 05:28Momentary-Only Light Activation Philosophy
  13. 06:17Range Session: Steel Challenge Setup
  14. 06:34Shooting in Various Configurations
  15. 06:58TA Targets and Double Helix Magstar
  16. 07:25Stage Walkthrough and Rules
  17. 08:09First Runs and Timings
  18. 09:32Tri-Lug System with Suppressor
  19. 10:11Rugged Obsidian 9: Short vs. Long Configuration
  20. 11:23End of Range Session Competition
  21. 12:25Double Helix Magstar Setup and Reset
  22. 12:39Conclusion and Viewer Engagement

Frequently Asked Questions

What is the core inspiration behind this custom AR-15 build?

The custom AR-15 build is primarily inspired by the aesthetic of the Heckler & Koch MP5. The goal was to create an AR-15 platform that visually and functionally emulates aspects of the iconic MP5 submachine gun, particularly by using an AR-15 lower receiver designed to accept MP5 magazines.

What are the key components of this MP5-inspired AR-15 build?

The build features a New Frontier Armory C5 lower receiver, a side-charging upper, an 8-inch 9mm barrel, an SB Tactical PDW brace, a Geissele 7-inch rail, and a tri-lug adapter. It's accessorized with a Holosun HS503CU optic, a Bobro Engineering QD mount, and a Modlite Mod button with an OKW light.

How does the tri-lug adapter system benefit this build?

The tri-lug adapter system is crucial for this build as it allows for extremely quick and easy swapping of muzzle devices and suppressors. This versatility is demonstrated with the Rugged Obsidian 9 suppressor, which can be attached and detached rapidly for different shooting scenarios.

What is the presenter's philosophy on weapon-mounted light activation?

The presenter prefers momentary-only activation for weapon-mounted lights, like that provided by the Modlite Mod button. This design prevents accidental constant-on activation, which could reveal the user's position, and ensures light activation is a deliberate action for scanning or engaging threats.

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