How To Mount A Holosun 507K To A G43x MOS

Published on October 21, 2022
Duration: 7:46

Mounting a Holosun 507K on a Glock 43X MOS requires slide modification due to the factory posts being designed for the Shield Arms RMSc footprint. GlockStore offers a service to mill the slide, allowing the 507K to sit lower for better co-witnessing with suppressor sights. This direct mount provides a more natural point of aim compared to using adapter plates, which raise the optic.

Quick Summary

Mounting a Holosun 507K on a Glock 43X MOS requires milling the slide because the factory posts are designed for the RMSc footprint. This modification allows the 507K to sit lower, improving co-witnessing with suppressor sights and offering a more natural aim.

Chapters

  1. 00:00Intro: G43X MOS & Holosun 507K
  2. 01:14Holosun Circle Dot Benefits
  3. 02:00Mounting Challenges on G43X MOS
  4. 02:57GlockStore Slide Machining Service
  5. 05:11GlockStore Facility & Services

Frequently Asked Questions

Why can't I directly mount a Holosun 507K on a Glock 43X MOS?

The Glock 43X MOS slide has specific mounting posts designed for the Shield Arms RMSc footprint. The Holosun 507K requires the slide to be milled, removing the rear posts and lowering the front posts, to achieve a secure and low-profile fit.

What is the benefit of milling the Glock 43X MOS slide for the Holosun 507K?

Milling allows the Holosun 507K to sit lower on the slide, closer to the bore axis. This results in a better co-witness with suppressor-height sights and a more natural, faster sight picture compared to using adapter plates.

How long does GlockStore's slide milling service take?

GlockStore offers a guaranteed turnaround time of 10 days or less for their slide milling services. This ensures you get your firearm back relatively quickly after modification.

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