How-To Mount Red Dot Optic to a Slide (Non-SIG LOC) | SIG SAUER

Published on March 18, 2026
Duration: 1:44

This guide details the process of mounting a red dot optic, specifically the Romeo X, onto a non-SIG SAUER slide. It emphasizes proper indexing, applying forward pressure, using Loctite on screws, and achieving the correct torque specification with a torque-limiting driver for a secure and reliable installation. The instructor, Mike from 6our Academy, provides clear, step-by-step instructions suitable for beginners.

Quick Summary

To mount a red dot optic on a non-SIG SAUER slide, first remove the sight plate. Then, index the optic, ensuring lugs align and it's centered. Apply Loctite to screws, fingertighten them, and apply forward pressure to the optic. Finally, use a torque-limiting driver to tighten screws to the manufacturer's specified torque.

Chapters

  1. 00:00Introduction and Overview
  2. 00:12Removing Sight Plate
  3. 00:19Indexing the Red Dot Optic
  4. 00:30Applying Loctite and Fingertightening Screws
  5. 00:39Screw Set Selection
  6. 01:06Torquing the Screws
  7. 01:32Conclusion

Frequently Asked Questions

What is the first step in mounting a red dot optic to a non-SIG SAUER slide?

The first step, after ensuring the firearm is unloaded, is to remove the sight plate screws from the slide. Then, you will index the red dot optic onto the slide, making sure its lugs align with the screw holes and that the optic is centered.

What is important to do while tightening the screws for a red dot optic?

While tightening the screws, it's crucial to apply a small amount of forward pressure to the optic. This ensures the optic sits flush against the slide, which is vital for a secure mount and maintaining your zero.

How do you know which screws to use when mounting a red dot optic?

Optics like the Romeo X typically come with multiple sets of screws. Consult the owner's manual; it will have a chart that specifies which set of screws to use based on your firearm's slide configuration.

What tool is recommended for tightening optic mounting screws?

A torque-limiting driver is highly recommended for tightening optic mounting screws. This tool allows you to set a specific torque value, ensuring the screws are tightened correctly according to the manufacturer's specifications without over-tightening.

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