C&H Precision | Optic Plate for Sig P320 Legion (M17/M18)

The C&H Precision adapter plate converts the R1P/DPP cut on Sig P320 Legion (M17/M18) slides to accommodate optics using the RMR-pattern footprint. It is precision machined on HAAS CNC equipment and finished with a durable black anodize for consistent fit and appearance. Mounting hardware is stainless steel and replaceable to reduce the need to replace the entire plate if a fastener is damaged.

Product Specifications

• The plate is made from 6061 aluminum for a balance of strength and weight.
• The finish is a black anodize to resist wear and provide consistent appearance.
• The mounting hardware supplied is stainless steel for corrosion resistance.
• The product fits Sig P320 Legion (M17/M18) slides as specified by the manufacturer.
• The plate converts an R1P/DPP cut to an RMR-pattern optic footprint (Trijicon/Holosun pattern compatibility noted in vendor data).
• The plate is supplied as 1 piece in the package.
• The product type is listed as a Mount intended for red dot optics.
• The style is a Red Dot Optic Mount that is optic-specific to the listed fit.
• The plate includes mounting screws as part of the hardware package.
• Most plates feature a patented stainless steel T-Nut providing six to seven threads of engagement.
• All mounting hardware is replaceable so damaged hardware can be swapped without replacing the plate.
• The plates are precision machined on HAAS CNC machines and undergo multiple quality checks.
• The product is manufactured and shipped from Coastal Georgia by a small family-owned business.
• The color is listed as Black.
• UPC: 616943733563.

This adapter plate is suited to competitive or duty-style carry configurations where a slide cut needs to accept an RMR-pattern optic. Its serviceable hardware and proven materials make it a practical choice for those who want a reliable, replaceable mounting solution without altering the pistol slide beyond the intended cut. The plate’s precision machining supports consistent optic alignment for range use and training scenarios.