C&H Adapter Plate for SIG P320 Legion — RMR/SRO & Holosun Mounting

Upgrade your optic setup with the C&H Precision Adapter Plate, designed for SIG P320 Legion, M17, and M18 handguns that use Glock-style sight dovetails. This steel plate blends rugged durability with precise machining to support a range of trusted red dot optics, all while preserving a sleek, low-profile appearance on your slide.

Engineered for long-lasting performance, the plate features a MIL-SPEC Type III hard anodized black finish and 416 stainless steel T-nuts that deliver reliable thread engagement for repeatable mounting. The HAAS CNC workflow ensures tight tolerances and a precise, repeatable fit so your optic sits true time after time. The kit includes replaceable mounting hardware, enabling easy swaps if a component is damaged or you switch optics, which can extend the life of your setup.

Key features

• 416 stainless steel T-nuts provide robust thread engagement
• MIL-SPEC Type III hard anodized black finish for durability and concealment
• HAAS CNC machined to tight tolerances for a precise, secure fit
• Replaceable mounting hardware for easy maintenance

Optic compatibility and versatility

The plate is designed to accommodate a wide range of optics using popular footprints. It places your optic in a secure, repeatable position with a clean, streamlined profile, and it supports Glock sight dovetails for broad compatibility. Specifically, it is suitable for Trijicon RMR and SRO footprints as well as Holosun models including 507C, 407C, 508C, and 508T.

• Trijicon RMR footprint
• Trijicon SRO footprint
• Holosun 507C, 407C, 508C, 508T footprints
• Glock-style dovetail compatibility for additional optic options

Whether you are preparing for competition, daily practice, or field use, the plate aims to provide a stable sight picture and a quick return to zero after reattachment, while maintaining a discreet, low-profile look on the firearm.

What’s included and how it helps

• Comprehensive mounting kit with various optic screws for compatibility
• Replaceable mounting hardware supports ongoing use with different optics

In short, the C&H Adapter Plate combines precision engineering with practical versatility, offering a reliable optic mounting base for your SIG P320 Legion, M17, or M18. It is a thoughtful option for shooters who value materials, accuracy, and adaptable design without overcomplicating the setup.