C&H Precision Sig P320X Optic Adapter Plate for RMR/SRO/Holosun
C&H Precision Weapons
$142.99
(No reviews yet)
Write a Review
C&H Precision Weapons
C&H Precision Sig P320X Optic Adapter Plate for RMR/SRO/Holosun
The C&H Precision Weapons SIG P320X Adapter Plate lets you mount a Trijicon RMR, SRO, or Holosun 507C/407C/508C/508T optic directly onto your SIG P320 Legion (X-Five, M17, or M18) slide that features an R1P or DPP cut — delivering a precise, rattle-free fit engineered for serious shooters.
- Converts SIG P320 Legion R1P/DPP cut to Trijicon RMR/SRO and Holosun footprint
- Compatible with X-Five, M17, and M18 Legion variants out of the box
- Precision machined from aerospace-grade 6061 aluminum for lightweight strength
- Stainless steel mounting hardware included for corrosion-resistant, secure installation
- Machined on HAAS CNC equipment to the tightest tolerances in the industry
- Designed, manufactured, and quality-checked in the USA by a family-owned business
Who This Is For
This adapter plate is purpose-built for competitive shooters, duty carriers, and everyday concealed carriers who own a SIG P320 Legion with an R1P or DPP optic cut and want to run a Trijicon RMR, SRO, or a Holosun 507C, 407C, 508C, or 508T red dot without sending their slide out for custom milling. It's an ideal solution for anyone upgrading their optic or transitioning between optic platforms without sacrificing zero retention or slide integrity.
Specifications
| Brand | C&H Precision Weapons |
|---|---|
| Compatible Pistols | SIG P320 Legion (X-Five, M17, M18) |
| Required Slide Cut | R1P / DPP Cut |
| Compatible Optics | Trijicon RMR, SRO; Holosun 507C, 407C, 508C, 508T |
| Material | 6061 Aluminum |
| Hardware | Stainless Steel Mounting Screws Included |
| Country of Origin | Made in the USA |
| Manufacturer | Family-owned, Coastal Georgia |
Frequently Asked Questions
Will this adapter plate work with my specific SIG P320 Legion variant?
This plate is designed specifically for the SIG P320 Legion family — including the X-Five, M17, and M18 — but only when the slide features an R1P or DPP optic cut. If your P320 has a different factory optic cut (such as the XRAY3 or standard RMS cut), this particular plate will not be the correct fit. Check your slide's existing cut before ordering, and contact C&H Precision or Goodland Guns if you're unsure which plate matches your configuration.
Which red dot optics are compatible with this adapter plate?
This plate is machined to accept optics using the Trijicon RMR/SRO footprint and the Holosun 507C, 407C, 508C, and 508T footprint — both of which share a compatible mounting pattern. Popular choices include the Trijicon RMR Type 2, the Trijicon SRO, the Holosun 507C-X2, and the Holosun 508T. It is not designed for optics using the Leupold DeltaPoint Pro, Shield RMS, or other proprietary footprints.
Does installing this plate require any gunsmithing or special tools?
In most cases, no gunsmithing is required. The adapter plate drops into the existing R1P or DPP cut on your SIG P320 Legion slide and secures using the included stainless steel hardware. A proper torque wrench and thread-locking compound (such as Loctite 243) are recommended to ensure the optic and plate remain secure under recoil. Always follow the optic manufacturer's torque specifications, and perform a function check before carrying or competing with the installed optic.
