Upgrading my Carry Glocks

Published on August 25, 2025
Duration: 18:29

This video details troubleshooting and upgrading Glock pistols for concealed carry. It covers fixing Gen 3 Glock ejection issues using a Gen 5 ejector, the benefits of factory MOS slides with direct-mount optics like the Holosun SCS, and compares a modified Glock 19 to a Shadow Systems MR920. The presenter emphasizes practical reliability over aesthetics, sharing personal experiences with aftermarket parts and their potential pitfalls.

Quick Summary

To fix erratic ejection ('brass to face') on a Gen 3 Glock, especially with an optic, install a Gen 5 ejector (part 47021) into a Gen 3 trigger housing. This modification significantly improves brass deflection and prevents stovepipe malfunctions.

Chapters

  1. 00:00Carry Philosophy & Glock Preference
  2. 02:12Shadow Systems MR920 & Trigger Issues
  3. 05:04Glock 19 Gen 3 MOS Slide & Holosun SCS
  4. 08:05Reliability Issues: Brass to Face
  5. 09:51The Gen 5 Ejector Fix
  6. 12:42Final Comparison & Conclusion

Frequently Asked Questions

How can I fix the 'brass to face' ejection issue on my Gen 3 Glock?

The most effective fix for Gen 3 Glock ejection issues, especially when running an optic, is to replace the original ejector with a Gen 5 ejector (part number 47021) installed in a Gen 3 trigger housing. This significantly improves brass deflection.

Can I mount a red dot sight directly to a Glock Gen 3 MOS slide?

Yes, Glock offers factory MOS (Modular Optic System) slides for Gen 3 models. Optics like the Holosun SCS are designed for direct mounting to these MOS cuts, often sitting low enough to co-witness with standard iron sights.

What are the pros and cons of the Shadow Systems MR920 compared to a modified Glock 19?

The MR920 offers a preferred grip texture and angle for drawing, but its stock trigger was found to be poor. While a modified Glock 19 can be made reliable, the presenter experienced trigger failures with aftermarket kits in the MR920.

Which Glock model is best for deep concealment?

For deep concealment, the Glock 43 is often preferred due to its compact size and comfort. While larger Glocks like the 19 can be carried, the G43 remains a top choice for maximum concealability.

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