Don't Make This Mistake If You Own A Glock

Published on November 24, 2025
Duration: 0:38

This guide details the critical step of using the correct screws when mounting optics on a Glock MOS pistol. Using screws that are too long can cause malfunctions by interfering with the extractor assembly, potentially leading to firearm jams during critical moments. Always test fire after installation to ensure reliability.

Quick Summary

The most common mistake when mounting optics on a Glock MOS pistol is using the wrong screws. Screws that are too long can interfere with the extractor assembly, causing malfunctions like failures to feed and eject. Always use the specific screws provided for your optic plate and test fire thoroughly.

Chapters

  1. 00:00The Glock MOS Optic Mounting Mistake
  2. 00:09Mechanical Consequences of Wrong Screws
  3. 00:20Safety and Reliability Testing

Frequently Asked Questions

What is the most common mistake when mounting optics on a Glock MOS?

The most common mistake is using the wrong screws. Using screws that are too long can physically interfere with the extractor assembly inside the slide, leading to frequent malfunctions like failures to feed and eject.

How can incorrect optic mounting screws affect a Glock pistol's function?

If screws are too long, they can impede the movement of the extractor assembly. This mechanical interference prevents the pistol from reliably feeding new cartridges or ejecting spent casings, causing jams.

Why is testing your Glock MOS after optic installation important?

Testing is crucial to ensure the firearm functions reliably with the newly mounted optic. You might not discover a malfunction caused by incorrect mounting hardware until a critical moment, such as a self-defense situation.

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