13.7 Rifle Build [BUILD]

Published on March 27, 2020
Duration: 15:31

This video details the build philosophy behind a 13.7-inch AR-15, focusing on its 'assaultive style' configuration for unsuppressed use. The presenter explains component choices, emphasizing a longer barrel for increased lethality and a longer rail for better purchase. Key components include a Ballistic Advantage 13.7-inch barrel with a pinned and welded Dead Air flash hider to achieve legal 16 inches, a K2 grip for preferred angle, a Rock River Arms two-stage trigger for trigger prep, and a Primary Arms GLx 2.5-10x optic. The build prioritizes a forward grip and a powerful flashlight for illumination, with the understanding that dedicated night vision setups would utilize different firearms.

Quick Summary

This 13.7-inch AR-15 build is designed as an 'assaultive style' rifle for unsuppressed use, prioritizing a longer barrel for increased lethality and a longer rail for better control. Key components include a 13.7" Ballistic Advantage barrel with a pinned and welded Dead Air flash hider, a Rock River Arms two-stage trigger for trigger prep, and a Primary Arms GLx 2.5-10x optic.

Chapters

  1. 02:30Build Philosophy Explained
  2. 03:22Stock and Grip Selection
  3. 04:00Internal Components (BCG, Lower, Trigger)
  4. 05:18Objective: Assaulter Style Rifle
  5. 06:04Optic Choice and Rationale
  6. 08:08Iron Sights Omission
  7. 08:30Rail System Discussion
  8. 10:10Barrel and Muzzle Device (13.7" Build)
  9. 11:25Accessory Integration (Lights/NV)
  10. 12:08Flashlight Choice (ProTac HL-X)
  11. 13:52Sling Setup (VTAC)
  12. 14:46Final Thoughts and Philosophy

Frequently Asked Questions

What is the primary purpose of this 13.7-inch AR-15 build?

The primary purpose of this 13.7-inch AR-15 build is to function as an 'assaultive style' rifle intended for unsuppressed use. The builder prioritized a longer barrel for increased lethality and range, along with a longer rail for improved forward purchase and control.

Why was a 13.7-inch barrel chosen for this AR-15 build?

A 13.7-inch barrel was chosen for this AR-15 build to achieve a balance between maneuverability and ballistic performance when paired with a pinned and welded muzzle device like a Dead Air flash hider, reaching the legal 16-inch minimum barrel length.

What optic is recommended for this AR-15 build and why?

The presenter recommends the Primary Arms GLx 2.5-10x optic for this AR-15 build. Its benefits include a bright reticle, lightweight design, clear glass, and tritium/fiber-optic illumination, functioning effectively as a red dot with magnifier capabilities for the rifle's intended use.

What are the key considerations for accessories on this AR-15 build?

Key accessory considerations include a durable ProTac HL-X flashlight for primary nighttime illumination and a VTAC sling for quick adjustments and weapon stowage. While night vision is mentioned, this build prioritizes white light for general use, with dedicated night vision setups on other firearms.

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