SIG-LOC™ PRO Install | SIG SAUER

Published on May 24, 2026
Duration: 5:23

This guide details the professional installation of the SIG-LOC™ PRO optic onto SIG SAUER pistols. It emphasizes safety by ensuring the firearm is unloaded, followed by a step-by-step process of slide disassembly, optic preparation with Loctite, secure mounting using specific torque settings, and final firearm reassembly. The guide highlights the unique features of the SIG-LOC system that ensure strength and repeatability for optic mounting.

Quick Summary

The SIG-LOC™ mounting system, meaning Leverage Optimized Connection, offers superior strength and reliability for pistol optics. Key features include slide recoil holes, through-hole screws, and a front dovetail lock. For installation, apply Loctite sparingly to screw threads and torque to 20 inch-pounds, allowing 24 hours for curing.

Chapters

  1. 00:00Introduction to SIG-LOC Optic System
  2. 00:24Firearm Safety and Disassembly
  3. 01:04Slide Preparation and Cover Plate Removal
  4. 01:37SIG-LOC Compatible Slide Features
  5. 02:14Optic Fitment and Preparation
  6. 02:33Applying Loctite to Optic Screws
  7. 03:06Mounting the Optic to the Slide
  8. 03:20Securing Optic Screws
  9. 03:54Torquing Optic Mounting Screws
  10. 04:23Loctite Curing Period
  11. 04:31Firearm Reassembly
  12. 05:11Final Function Check

Frequently Asked Questions

What is the SIG-LOC™ mounting system?

SIG-LOC™ stands for Leverage Optimized Connection. It's an industry-leading system from SIG SAUER designed for exceptional strength, reliability, and repeatability when mounting optics to pistols, featuring unique interface points for a secure lockup.

What are the key features of a SIG-LOC compatible slide?

SIG-LOC compatible slides have a recoil hole in the front and rear to interface with optic lugs, two through holes for screws from underneath, and a dovetailed section in the front that locks the optic securely into the slide for enhanced stability.

What is the recommended torque setting for SIG-LOC PRO optic screws?

The recommended torque setting for the SIG-LOC PRO optic mounting screws is 20 inch-pounds. It's crucial to use a calibrated torque wrench to achieve this precise setting for optimal performance and longevity.

How long should I wait after installing a SIG-LOC optic before firing?

After installing a SIG-LOC optic and applying Loctite to the screws, you must allow a 24-hour curing period. This ensures the Loctite fully sets, providing a robust and reliable bond for the optic.

Related News

All News →

More Tactical & Gear Videos You Might Like

More from SIG SAUER, Inc

View all →