Glock 43X MOS Adapter Plate – Secure Mount for Red Dot Optics

Upgrade your Glock 43X MOS with the confidence of a secure and precise optic mount. This adapter plate is designed specifically for the 43X and 48 MOS models, allowing you to mount a wide range of red dot sights — including Trijicon RMR, RMRcc, and Holosun models — without compromising fit or function.

Made from durable, high-grade aluminum and finished with a hardcoat anodized layer, this plate ensures stability, zero retention, and rugged performance. Whether you’re heading to the range, carrying for self-defense, or upgrading for competition, this adapter plate is engineered to perform when it counts.

Forget one-size-fits-all mounts. This solution is precision-machined for Glock slimline MOS platforms, offering a seamless installation and rock-solid optic alignment.

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🔧 Key Features:

• Compatible with Glock 43X MOS and Glock 48 MOS

• Supports top red dot optics: Trijicon RMR, RMRcc, Holosun 407K, 507K, 508T

• CNC-machined from aerospace-grade aluminum

• Hardcoat anodized for durability and corrosion resistance

• Maintains zero under heavy recoil and extended use

• Easy drop-in installation — no gunsmithing needed

• Made in the USA

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📦 What’s Included:

• 1x Adapter Plate

• Mounting screws

• Sealing plate (if required)

• Thread locker

• Step-by-step installation instructions

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🔄 Compatible Optics:

• Trijicon: RMR, RMRcc, SRO

• Holosun: 407K, 507K, 508T, EPS

• Shield RMSc, and similar red dots (based on adapter model selection)

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Complete Your Glock 43X MOS Red Dot Setup

• Don’t have an optic yet? Pair this plate with the Trijicon RMR or Holosun 507K for top-tier performance.
• For better co-witnessing, check out our suppressor-height Glock sights.
• Looking for a plate specifically for RMRcc? See the Glock 43X RMRcc adapter.
• Want a non-MOS option? Try the rear sight Holosun adapter plate for Glock 43X.
• View our full line of Glock optics mounting plates for every red dot platform.

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🙋 FAQ – Glock 43X MOS Adapter Plate

Q: Will this adapter fit my Glock 43X without the MOS cut?
A: No. This plate is designed exclusively for factory MOS-cut Glock 43X and 48 models.

Q: What red dot sights will this plate fit?
A: It supports Trijicon RMR, RMRcc, SRO, and Holosun models like the 407K, 507K, 508T, and EPS — depending on the plate variation.

Q: Is this a permanent modification?
A: No. It installs using the existing MOS cut and is fully reversible.

Q: Can I co-witness factory iron sights with a red dot using this plate?
A: In most cases, no. You may need suppressor-height sights for co-witnessing depending on the optic height.

Q: How easy is installation?
A: Very simple. All hardware and instructions are included — no gunsmithing required.

Q: Does the adapter plate maintain zero under recoil?
A: Yes. It’s designed to keep your optic secure and stable under continuous use and recoil.