The C&H Precision Optic Mount Plate enables seamless mounting of Holosun 509T optics on Sig Sauer P320 X-FIVE M17 and M18 pistols with Romeo1Pro/DPP cuts. Precision machined on HAAS CNC machines with anodized finish for durability.C&H Precision Optic Mount Plate for Sig P320 X-FIVE to Holosun 509TCompatible with P320 X-FIVE M17 M18 Romeo1Pro/DPP CutPatented stainless steel T-Nut with 6-7 threads of engagementAnodized finish for corrosion resistanceAll mounting hardware included and replaceablePrecision CNC machined to tight tolerancesManufactured by a family-owned business in Coastal Georgia with multiple quality checks this mount provides a secure reliable platform for your Holosun 509T optic on Sig P320 X-Series pistols.