NEW Glock Factory Gen 3 MOS Spare Slides HANDS-ON

Published on March 6, 2025
Duration: 12:09

This guide details the installation of a new Glock factory Gen 3 MOS spare slide onto a compatible Glock frame. It covers the transfer of essential components like the barrel and guide rod, and provides instructions for adapting the slide to work with Gen 4 and Gen 5 Glock frames using specific adapter plates. The video emphasizes the flexibility of the MOS system for optic mounting.

Quick Summary

The Glock OEM Gen 3 MOS Spare Slide can be installed on Gen 3 frames by transferring the barrel and guide rod. It can also be adapted for Gen 4 and Gen 5 frames using specific adapter plates and a nose ring. The MOS system allows for direct mounting of optics like the Holosun SCS or use of adapter plates for other sights.

Chapters

  1. 00:00Introduction to Glock OEM Gen 3 MOS Slides
  2. 01:14Unboxing and Components
  3. 02:02Installation on Gen 3 Frame
  4. 03:56Optic Mounting Options
  5. 05:22Cross-Generation Compatibility

Frequently Asked Questions

What is included with the Glock OEM Gen 3 MOS Spare Slide?

The Glock OEM Gen 3 MOS Spare Slide comes with essential internal parts pre-installed, such as the striker assembly, extractor, and safety plunger. However, it notably excludes the barrel and guide rod, which must be transferred from your existing slide.

Can the Glock Gen 3 MOS slide be used on Gen 4 or Gen 5 Glock frames?

Yes, the Gen 3 MOS slide can be adapted for use on Gen 4 and Gen 5 Glock frames. This requires changing the slide cover plate to a specific adapter plate and using a nose ring adapter to ensure proper function and fit.

What optics can be mounted on the Glock Gen 3 MOS slide?

The Glock Gen 3 MOS slide features the Modular Optic System (MOS) cut, allowing for direct mounting of compatible red dot sights like the Holosun SCS. Other optics, such as the Holosun EPS Carry, can be mounted using appropriate adapter plates.

Why are Gen 3 Glock models still relevant, especially in California?

Gen 3 Glock models remain relevant due to specific firearm regulations in certain jurisdictions, such as California, where they are often permitted when newer generations may be restricted. This makes upgrades like the Gen 3 MOS slide valuable for owners in those areas.

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