C+H Optics MOS Adapter Plate for G17 G19 MOS - Low Profile Strength

In this review the C+H Optics MOS Adapter Plate is judged as a practical mid-priced replacement plate for Glock MOS models that need a slimmer, more secure optic interface. It is best for owners of G17, G19, G22, G23, G34, G40, G41, G45 and G47 MOS who want reduced height over bore and a robust mounting method. The plate's patented T-Nut system and ultra-thin aluminum construction deliver clear benefits in reliability and sighting speed, though buyers must confirm model fitment carefully before ordering.

Key Features

• Compatibility: Fits only MOS optics-ready Glock models listed, ensuring a correct fit for supported frames when used with compatible optics.
• Optic fitment: Accepts Trijicon type 1 and type 2 RMR and SRO patterns plus Holosun 407c/507/508 variants for broad optic choices.
• Patented T-Nut mounting: Provides 6 to 7 threads of engagement, roughly double the typical thread engagement for a more secure optic retention.
• Ultra-thin profile: Slimmer and lighter than many competitors, reducing height over bore to help with faster follow-up shots and a lower sight picture.
• Aircraft aluminum construction: Precision machined and MIL-SPEC Type III hard coat anodized for durability and wear resistance in field use.

Who It's For

The adapter plate is ideal for shooters who already own an MOS-ready Glock listed in the compatibility and who want a low-profile, durable plate for common red dot sights like Trijicon RMR/SRO and Holosun 407/507/508 series. It suits competitive shooters, duty users and serious recreational shooters who value reduced height over bore and a robust mounting system.

It is not for owners of Glock 43, 43X, 48 MOS or non-MOS models, or users who rely on optics not listed as compatible such as the Trijicon RCR. Anyone unsure about their model should verify fit before purchase, and those very sensitive to screw durability complaints may want to keep spare hardware on hand.

Pros & Cons

Pros

• Stronger T-Nut engagement improves long-term retention compared with many stock plates.
• Low-profile, ultra-thin design reduces sight height and aids follow-up shot speed.
• Quality materials and hard coat anodize increase resistance to wear and corrosion.
• Wide compatibility with Trijicon RMR/SRO and multiple Holosun models provides flexibility.

Cons

• Does not fit Glock 43/43X/48 MOS or non-MOS models, limiting applicability.
• Some customers report screw and nut durability issues, so careful installation and spare hardware are advisable.

Specifications

Product	C+H Optics MOS Adapter Plate for Glock MOS
Compatible Glock Models	G17, G19, G22, G23, G34, G40, G41, G45, G47 MOS
Not Compatible	G43, G43X, G48 MOS or non-MOS Glock models
Optic Compatibility	Trijicon type 1 & type 2 RMR/SRO; Holosun 407c, 507c/507comp/508c/508t variants
Mounting System	Patented T-Nut with 6-7 threads of engagement
Material & Finish	Aircraft-grade aluminum, MIL-SPEC Type III hard coat anodized

Our Verdict

The C+H Optics MOS Adapter Plate is a sensible upgrade for owners of the supported Glock MOS models who want a lower sight plane and a more secure optic mount. Its patented T-Nut and thin profile make it a practical choice for competitive and duty use, though shoppers should confirm model compatibility and be mindful of reported screw durability concerns. For supported guns and compatible optics this plate represents solid value for reliability and reduced height over bore.

Frequently Asked Questions

Will this plate fit my Glock 19 MOS?
Yes, the plate is explicitly compatible with the G19 MOS and the listed Glock MOS models.

Which optics will mount to this plate?
It supports Trijicon type 1 & type 2 RMR and SRO footprints and Holosun 407c, 507c/507comp, 508c and 508t variants; it is not compatible with Trijicon RCR.

Are mounting screws and nuts reliable?
Many users report good function, but there are reports of screw or nut failures; use proper torque, check hardware after installation, and keep spares if concerned.