The Glock 43X Just Received A Big Update

Published on September 11, 2025
Duration: 5:54

Glock has updated the MOS footprint on the 43X, particularly FDE/Coyote models, replacing bosses with screw posts for direct mounting of popular optics like Holosun 507K and EPS Carry. This new design offers improved optic stability and thread engagement compared to the original MOS system. The update simplifies optic installation, eliminating the need for milling or adapter plates for compatible red dots.

Quick Summary

The Glock 43X MOS has been updated with a new optic footprint, replacing the original four bosses with two screw posts. This allows popular optics like the Holosun 507K and EPS Carry to mount directly, offering a flush fit and improved stability without milling.

Chapters

  1. 00:00Introduction and Giveaway
  2. 01:04Glock 43X MOS Footprint Update
  3. 01:26Optic Compatibility Explained
  4. 02:13Comparison with Original MOS Slide
  5. 04:04Technical Advantages of New System
  6. 04:48Vortex Day Event Announcement

Frequently Asked Questions

What is the main update to the Glock 43X MOS?

The Glock 43X MOS, particularly the FDE/Coyote versions, received an updated optic footprint. It now features two screw posts instead of four bosses, allowing direct mounting of popular optics like the Holosun 507K and EPS Carry.

Do I need to mill my Glock 43X MOS slide for a Holosun K-series optic?

Only if you have the original black Glock 43X MOS slide. The newer FDE/Coyote versions with the updated two-post footprint allow direct mounting of Holosun K-series optics without milling.

What are the benefits of the new Glock 43X MOS optic mounting system?

The updated system offers a flush fit for compatible red dot sights and provides better thread engagement for mounting screws. This enhances optic stability and simplifies installation by eliminating the need for adapter plates or milling.

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