SIG LOC Optics Compatibility with Slides | SIG SAUER

Published on September 24, 2025
Duration: 1:42

This video from SIG Sauer Academy explains how to identify SIG Lock compatible pistol slides and optics. It details a visual inspection method for slides and distinguishes SIG Lock optics from traditional models based on screw hole placement and branding.

Quick Summary

To determine SIG Lock compatibility on a SIG Sauer slide, lock the slide to the rear and inspect its bottom. The presence of two holes that go through the slide from the bottom indicates SIG Lock compatibility. Traditional slides lack these holes.

Chapters

  1. 00:00Introduction to SIG Lock Compatibility
  2. 00:14How to Check Slide Compatibility
  3. 00:33Previous Generation Slide Differences
  4. 00:41Identifying SIG Lock Optics
  5. 00:51Traditional Optics vs. SIG Lock Optics
  6. 01:12SIG Lock Mounting Solution Explained
  7. 01:28Conclusion on Compatibility Differences

Frequently Asked Questions

How can I tell if my SIG Sauer slide is compatible with SIG Lock optics?

To check for SIG Lock compatibility, lock your slide to the rear. Inspect the bottom of the slide; if you see two holes that go through from the bottom, your slide is SIG Lock compatible. Previous generation slides will not have these holes.

What are the visual differences between SIG Lock optics and traditional pistol optics?

SIG Lock optics are labeled 'SIG Lock' and have screw holes on the bottom. Traditional optics for older slides have screw holes on the top and lack the SIG Lock emblem. The SIG Lock system mounts from the bottom.

Where are the mounting screw holes located on SIG Lock optics?

SIG Lock optics feature screw holes on the bottom of the optic. This is because the mounting solution for the SIG Lock system is located underneath the optic, designed to interface directly with the compatible slide.

Can I check SIG Lock compatibility without disassembling my firearm?

Yes, you can check for SIG Lock compatibility without disassembling your firearm. Simply lock the slide to the rear and visually inspect the bottom of the slide for the presence of two holes that pass through it.

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