Turn Any Glock Into A COA Glock

Published on March 19, 2026
Duration: 10:45

This guide details the process of installing an Aimpoint COA red dot optic onto a Glock pistol using GlockStore's specialized optics cut service. It covers the necessary steps from slide preparation to final sight installation, emphasizing the unique mounting system of the COA and the importance of proper tool usage. The guide is presented by Lenny Magill, Founder/CEO of GlockStore Performance and Custom Shop, an expert with extensive experience in optics milling.

Quick Summary

The Aimpoint COA optic mounts to a Glock slide using a unique system involving specialized slide milling and a dedicated rear sight that captures the optic. This method allows for a lower mounting height and a 1/10th co-witness with iron sights, enhancing usability and reliability. GlockStore offers this optics cut service with a quick turnaround time.

Chapters

  1. 00:00Introduction to Red Dot Optics & COA
  2. 00:23Glock 43X with Aimpoint COA
  3. 00:44Aimpoint's Red Dot History and COA Mounting
  4. 01:20GlockStore's COA Cut Service
  5. 02:16Unique COA Mounting System Explained
  6. 03:26Installing COA Cut Rear Sight
  7. 04:20Tightening Screws and Loctite
  8. 06:20Importance of Tight Optics & Co-witnessing
  9. 07:25Angry Bear Arms Front Sight Options
  10. 08:11Front Sight Installation Tool
  11. 09:27GlockStore Service & Call to Action

Frequently Asked Questions

How does the Aimpoint COA optic mount to a Glock slide?

The Aimpoint COA optic uses a unique mounting system that captures into the slide via specialized rear sight and slide milling. This allows the optic to sit lower and co-witness with iron sights, with the rear sight securing the optic in place.

What is GlockStore's optics cut service?

GlockStore offers a service to mill Glock slides for various red dot optics, including the Aimpoint COA, Trijicon RMR, Holosun, and Vortex. They provide a 10-day or less turnaround time for this modification.

What are the benefits of installing an Aimpoint COA optic on a Glock?

Installing an Aimpoint COA optic can improve shooting speed and accuracy. The COA's unique mounting system allows for a lower profile and 1/10th co-witness with iron sights, providing a reliable aiming solution.

What tools are needed to install Angry Bear Arms front sights?

Installing Angry Bear Arms front sights requires a specialized front sight tool due to the small, hexagonal screw. This tool is necessary to properly seat and tighten the front sight in the limited space available on the slide.

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