1.54" vs 1.93" vs 2.26" - The Best AR-15 Optic Height? | 9-Hole Reviews

Published on October 24, 2024
Duration: 22:58

This video from 9-Hole Reviews, presented by MidwayUSA, delves into the optimal optic height for AR-15 platforms. Experts Henry and Josh analyze how optic mounting heights have evolved, from early carry handle mounts to modern configurations. They discuss the ergonomic and tactical advantages of higher mounts, particularly for use with body armor and night vision, while also detailing the ballistic trade-offs involved. The analysis highlights that while modern trends favor higher mounts for a 'heads-up' shooting posture, the best choice depends on the specific application, with lower mounts still being superior for precision or prone shooting.

Quick Summary

Common AR-15 optic mount heights include Absolute Co-Witness (approx. 1.42"), Lower 1/3rd (approx. 1.5"-1.7"), 1.93", and 2.26". Higher mounts facilitate a 'heads-up' shooting posture, beneficial with body armor and night vision, but introduce ballistic complexities requiring specific zeroing strategies.

Chapters

  1. 00:00Introduction: Optic Height Evolution
  2. 02:28Defining Sight Height & Mount Height Standards
  3. 03:16Historical Context: Carry Handles to Flat Tops
  4. 08:01The 'Heads-Up' Shooting Posture Advantage
  5. 10:30Mechanical & Ballistic Trade-offs of Height
  6. 13:30Final Recommendations & Use Cases

Frequently Asked Questions

What are the common AR-15 optic mount heights discussed?

The video discusses common AR-15 optic mount heights including Absolute Co-Witness (approx. 1.42"), Lower 1/3rd (approx. 1.5"-1.7"), 1.93", and 2.26". These measurements typically refer to the distance from the top of the receiver rail to the optic's centerline.

Why have AR-15 optic heights increased over time?

Optic heights have increased to accommodate modern shooting stances, particularly the 'heads-up' posture favored when wearing body armor or night vision. This improves peripheral vision and reduces neck strain compared to older, lower mounting methods.

What are the ballistic implications of higher optic mounts?

Higher optic mounts increase the angle between the line of sight and the bore. This steepens the bullet's arc, requiring adjustments to zeroing strategies to manage the maximum ordinate (highest point of trajectory) and close-range bullet drop.

Which AR-15 optic height is best for general use?

For general AR-15 carbine use, the 'Lower 1/3rd' (1.5"-1.7") is often considered a solid universal choice. Some prefer the 1.93" height for a better balance of ergonomics and control in dynamic shooting scenarios.

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