How To Set Up 4x Trijicon ACOG For Better Eye Relief (HD)

Published on July 8, 2017
Duration: 5:21

This guide details how to overcome the common short eye relief issue with 4x Trijicon ACOGs, particularly the TA31 model. Instruction from Mrgunsngear demonstrates a practical mounting solution: reversing the order of the optic and backup iron sights. By mounting the ACOG further back over the charging handle and placing the BUIS in front, shooters can achieve better eye relief and a more comfortable shooting posture, even with the trade-off of a slightly reduced BUIS sight radius.

Quick Summary

Improve your Trijicon ACOG eye relief by mounting it further back on the rifle rail, even over the charging handle. Relocating backup iron sights (BUIS) forward of the optic is key. This setup enhances shooting ergonomics, allowing a more comfortable stance and full field of view, despite a shorter BUIS sight radius.

Chapters

  1. 00:30ACOG Eye Relief Challenges
  2. 01:00Optic and Rifle Setup
  3. 01:45The Solution: Reversing Mount Order
  4. 02:20Sight Radius Trade-off
  5. 03:10Shooting Demonstration

Frequently Asked Questions

How can I improve eye relief on a Trijicon ACOG?

To improve eye relief on a Trijicon ACOG, try mounting it further back on your rifle's rail, potentially extending over the charging handle. You may also need to relocate your backup iron sights (BUIS) forward of the optic.

What is the main drawback of 4x ACOG scopes?

The primary drawback of many 4x ACOG scopes, like the TA31, is their very short eye relief, typically around 1.5 inches. This can make it difficult for shooters to achieve a full field of view comfortably from various positions.

Is it okay to move backup iron sights (BUIS) in front of an ACOG?

Yes, moving BUIS in front of an ACOG is a viable technique to improve the primary optic's eye relief. While it shortens the BUIS sight radius, it's often a worthwhile trade-off for better ergonomics with the main optic, especially for backup use.

What rifle was used to demonstrate the ACOG mounting fix?

The video demonstrated the ACOG mounting fix on a Smith & Wesson M&P Sport rifle. A GDI mount was also shown being used for the Trijicon ACOG.

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