The C&H Precision V4 Optic Mount is a precision-machined adapter plate that converts Sig Sauer P320 X-Series pistols (X-FIVE M17 M18) from Romeo1Pro/DPP cut to accept Holosun EPS and EPS Carry optics.Compatible with Sig Sauer P320 X-FIVE M17 M18 Romeo1Pro/DPP Cut to Holosun EPS/EPS CarryPrecision CNC machined from 6061 aluminum on HAAS machinesMIL-SPEC Type III Hard Anodized finish for durabilityPatented 416 stainless steel T-Nut design with 6-7 threads of engagementReplaceable mounting hardware for long-term serviceabilityIncludes optic plate M3 plate screws 4-40 mounting screws and SS T-NutsManufactured by a family-owned business in Coastal Georgia with multiple quality checks this mount provides reliable optic mounting with industry-leading thread engagement and replaceable components for maximum durability.