How to Install the OSight C Red Dot on Your Glock (Quick Tutorial)

Published on November 26, 2025
Duration: 0:41

This guide details the installation of the Olight OSight C red dot sight on a Glock pistol, emphasizing proper torque specifications and mounting procedures. The video demonstrates the use of a T10 Torx bit and a torque driver for precise installation, highlighting the RMR footprint compatibility. Instruction from a professional firearms instructor ensures correct techniques are followed for a secure optic mount.

Quick Summary

Proper installation of the Olight OSight C on a Glock requires attention to torque specs. Use a T10 Torx bit and torque driver: 12-13 in-lbs for adapter plate screws, 15 in-lbs for optic screws with an adapter plate, or 17 in-lbs for direct slide mounting. Blue thread locker is recommended for adapter plate screws.

Chapters

  1. 00:00Footprint and Compatibility
  2. 00:09Hardware Requirements
  3. 00:13Adapter Plate Installation
  4. 00:22Optic Mounting and Torque Specs

Frequently Asked Questions

What is the RMR footprint and why is it important for mounting the Olight OSight C?

The RMR footprint is a standard mounting interface for red dot sights, named after Trijicon's RMR. The Olight OSight C utilizes this footprint, meaning it can be mounted on slides milled for RMR or via adapter plates designed for this standard, ensuring broad compatibility.

What are the correct torque specifications for installing the Olight OSight C on a Glock?

When mounting the OSight C on a Glock, adapter plate screws should be torqued to 12-13 inch-pounds. The optic mounting screws require 15 inch-pounds if using an adapter plate, or 17 inch-pounds for direct slide mounting, using a T10 Torx bit.

What tools are needed to install the Olight OSight C red dot sight?

To properly install the Olight OSight C, you will need a T10 Torx bit and a torque driver capable of measuring inch-pounds (e.g., a Wheeler-style FAT wrench). Blue thread locker is also recommended for adapter plate screws.

Can I mount the Olight OSight C directly to any Glock slide?

No, the Olight OSight C requires either a Glock slide specifically milled for the RMR footprint or a Glock MOS (Modular Optic System) pistol equipped with an appropriate RMR adapter plate. Standard Glock slides without an optic cut will not directly accept the OSight C.

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