Description
C&H Precision Plate for Sig P320 Legion (M17/M18) R1P/DPP Cut to Trijicon RMR / SRO / Holosun 407C / 507C / 507Comp / 508T
The C&H Precision Plate for Sig P320 LegionPlate is designed to adapt compatible SIG Sauer P320 Legion, M17, and M18 slides with the Romeo1 Pro / DeltaPoint Pro (R1P/DPP) optic cut for use with popular Trijicon RMR-footprint optics.
The C&H Precision Plate for Sig P320 Legion provides compatibility with the Trijicon RMR and SRO, as well as compatible Holosun optics including the 407C, 507C, 507Comp, and 508T.
C&H Precision optic plates are precision machined on HAAS CNC equipment to tight tolerances and undergo multiple quality-control inspections before shipment. Designed and manufactured by C&H Precision in Coastal Georgia, this adapter plate provides a purpose-built solution for mounting RMR-footprint optics to compatible SIG P320 slides.
Compatible Optics
- Trijicon RMR
- Trijicon SRO
- Holosun 407C
- Holosun 507C
- Holosun 507Comp
- Holosun 508T
- Other compatible RMR-footprint optics where specified by the manufacturer
Firearm / Slide Compatibility
Designed for compatible:
- SIG Sauer P320 Legion
- SIG Sauer M17
- SIG Sauer M18
- Slides featuring the Romeo1 Pro / DeltaPoint Pro (R1P/DPP) optic cut
C&H Precision Plate for Sig P320 Legion Features
- Converts compatible SIG P320 R1P/DPP optic cuts to the RMR footprint
- Precision CNC machined
- Manufactured to tight tolerances
- Multiple quality-control inspections
- Designed for secure optic mounting
- Compatible with several popular Trijicon and Holosun red dot sights
- Designed and manufactured by C&H Precision in Coastal Georgia
Dry-Fitting Disclaimer
Due to tolerance variations between the firearm, mounting plate, optic, and mounting hardware, all components should be dry-fitted before final installation. Confirm proper fit and hardware engagement before applying thread locker or completing installation. Proper installation helps prevent damage to the optic, plate, firearm, or mounting hardware.
Iron Sight / Co-Witness Disclaimer
Installing an aftermarket optic or adapter plate may affect compatibility with factory iron sights. The iron sight height required to achieve a desired co-witness depends on several factors, including the firearm, slide cut, mounting plate, optic, and sight configuration. Factory-height sights may not provide a usable co-witness after installation.

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