Looking for a new RMR red dot?

Published on February 2, 2026
Duration: 0:09

This guide details the installation and initial use of an RMR footprint red dot sight, specifically the AT3 Tactical model, on platforms like the Glock 19 and Glock 17. It emphasizes the versatility of mounting on both handguns and rifles as a secondary optic. The video highlights the importance of the RMR footprint for compatibility and demonstrates practical application in a shooting range environment.

Quick Summary

The AT3 Tactical Red Dot Sight utilizes the popular RMR footprint, enabling versatile mounting on compatible pistol slides (like the Glock 19/17) or rifle Picatinny rails. This setup allows for rapid target acquisition, serving as a primary optic on handguns or a secondary/backup sight on rifles.

Chapters

  1. 00:00Introduction to Red Dot Sights
  2. 00:04Versatility and Mounting

Frequently Asked Questions

What is the RMR footprint used for on red dot sights?

The RMR footprint is a standardized mounting pattern, popularized by Trijicon's RMR, that allows red dot sights to be securely mounted onto compatible firearm slides or mounting plates, ensuring broad compatibility across different firearm models.

How can an AT3 Tactical Red Dot Sight be mounted on a firearm?

The AT3 Tactical Red Dot Sight, featuring an RMR footprint, can be mounted directly onto pistol slides that are milled for this pattern or attached via adapter plates. It can also be mounted on rifle Picatinny rails using appropriate mounts.

What firearms are shown with the AT3 Tactical Red Dot Sight?

The video prominently features the AT3 Tactical Red Dot Sight mounted on Glock pistols, specifically mentioning the Glock 19 and Glock 17. It is also shown mounted as a secondary optic on a rifle.

What are the benefits of using a red dot sight as a secondary optic on a rifle?

Using a red dot sight as a secondary optic on a rifle, often mounted piggyback on a primary scope, allows for rapid target acquisition at close ranges while maintaining the capability for longer-range shots with the main scope.

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