Thoughts on the Glock 19 MOS after 9k rounds.

Published on April 11, 2017
Duration: 5:57

This guide details the process of installing a red dot optic on a Glock 19 MOS, emphasizing the importance of the adapter plate system and proper screw torque. It highlights a common issue with RMR mounting screws loosening and recommends periodic checks. The Glock 19 MOS is presented as a reliable platform with a versatile optic-ready slide.

Quick Summary

The Glock 19 MOS is a reliable handgun, but its Modular Optic System (MOS) can have issues with optic mounting screws loosening every 500-600 rounds, particularly with Trijicon RMRs, due to shallow screw engagement. Suppressor height sights are needed for co-witnessing.

Chapters

  1. 00:00Introduction to Glock 19 MOS
  2. 00:45MOS System Mechanics & Round Count
  3. 01:30The RMR Mounting Issue
  4. 02:48Optic Height and Sights
  5. 03:48Reliability and Conclusion

Frequently Asked Questions

What are the main criticisms of the Glock 19 MOS optic mounting system?

The primary criticism is the lack of sufficient 'screw bite' depth for optics like the Trijicon RMR. This can cause mounting screws to loosen every 500-600 rounds, even with blue Loctite, requiring periodic checks and retightening.

What type of sights are needed for a Glock 19 MOS with a red dot?

Due to the increased height of the red dot optic mounted via the MOS system, suppressor height sights (like those from Ameriglo) are typically required to achieve a proper co-witness through the optic.

Is the Glock 19 MOS reliable despite optic mounting issues?

Yes, the speaker notes that despite the mounting quirks, the Glock 19 MOS maintains standard Glock reliability, having endured over 9,000 rounds without significant functional issues related to the firearm itself.

What is the benefit of the Glock 19 MOS system?

The Modular Optic System (MOS) allows users to easily mount various micro red dot optics directly to the slide using interchangeable adapter plates, making the handgun versatile and future-proof for optic choices.

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