C&H Precision Optics Adapter Plate | SIG P320 X Series

The C&H Precision optics adapter plate is a precision-machined mounting solution for SIG P320 Legion pistols including X-FIVE, M17 and M18 models. It features an R1P/DPP cut that accepts RMR, SRO and Holosun 407C/507C/508T footprints and retains compatibility with a 10-8 rear sight. Each plate is CNC-machined on HAAS equipment and undergoes multiple quality checks prior to shipping. Mounting screws are included so the plate can be installed with the supplied hardware.

Common applications include competition shooting and everyday carry or duty-oriented carry setups where a low-profile, repeatable micro-dot mounting solution is required.

Product Specifications

• The manufacturer is C&H Precision.
• Compatible with SIG P320 Legion (X-FIVE/M17/M18).
• The fit is listed as SIG X-Series.
• The model designation is Sig P320 X Series.
• The finish is Anodized.
• The color is Black.
• Mounting hardware is included.
• The plate has an R1P/DPP cut to support RMR, SRO and Holosun 407C/507C/508T footprints.
• The design maintains compatibility with a 10-8 rear sight.
• The product type is Mount.
• The subcategory is Optic Specific Mounts.
• Each plate is precision machined on HAAS CNC machines.
• Designed, manufactured and shipped from Coastal Georgia.
• UPC: 616943734300.

This adapter plate delivers a straightforward, serviceable way to fit popular micro red-dot footprints to SIG P320 X frames. The combination of precise CNC machining, a durable anodized finish and replaceable mounting hardware makes it suitable for shooters who want a repeatable mounting surface without replacing the entire slide assembly. Its compatibility with several common footprints and retention of the 10-8 rear sight keep the pistol’s sighting options versatile for competition and carry use.