SIG-LOC COMPACT Install | SIG SAUER

Published on June 10, 2026
Duration: 2:45

This guide details the installation of a SIG-LOC Compact optic onto a SIG SAUER pistol. It emphasizes safety by starting with a cleared firearm and covers field stripping, preparing the slide, applying Loctite, mounting the optic with specific torque values (18 inch-pounds), and reassembling the firearm. The process concludes with a crucial function check.

Quick Summary

To install a SIG-LOC Compact optic, first ensure the firearm is cleared. Field strip the pistol, clean the slide's mounting surface, and apply Loctite lightly to the optic screw threads. Mount the optic, then torque the screws to 18 inch-pounds using a torque wrench. Finally, reassemble the firearm and perform a function check.

Chapters

  1. 00:00Safety Check & Clearing Firearm
  2. 00:15Pistol Disassembly
  3. 00:23Removing Recoil Assembly & Barrel
  4. 00:33Accessing Optic Plate
  5. 00:43Removing Optic Plate Screws
  6. 00:56Storing Optic Plate
  7. 01:02Cleaning Mounting Surface
  8. 01:10Preparing Optic Screws with Loctite
  9. 01:25Seating Optic Wedge
  10. 01:35Mounting Optic - Screw 1
  11. 01:54Mounting Optic - Screw 2
  12. 02:04Torquing Optic Screws
  13. 02:15Reassembling Firearm
  14. 02:22Slide Reassembly
  15. 02:33Function Check

Frequently Asked Questions

What are the essential safety steps before installing a SIG-LOC Compact optic?

Before installing any optic, always ensure the firearm is completely unloaded. This involves visually and physically checking that the chamber is empty and that no magazine is inserted. This critical step prevents accidental discharges during the installation process.

How do you properly prepare the SIG SAUER slide for optic installation?

After field stripping and removing the optic plate, thoroughly wipe down the mounting surface on the slide. Ensure there is no oil, grease, or debris present. This clean surface is crucial for the optic to mount securely and maintain zero.

What is the recommended torque value for SIG-LOC Compact optic mounting screws?

The recommended torque value for the SIG-LOC Compact optic mounting screws is 18 inch-pounds. Using a torque wrench ensures the optic is secured properly without over-tightening, which could damage the slide or the optic.

Should Loctite be used when installing a SIG-LOC Compact optic?

Yes, it is recommended to use the supplied Loctite. Apply it very lightly to the threads of the optic mounting screws. Avoid over-application, as this can make future removal difficult or damage components.

Related News

All News →

More Gunsmithing & DIY Videos You Might Like

More from SIG SAUER, Inc

View all →