C&H Precision V4, Optic Mounting Plate, For Sig Sauer P320 X-FIVE/M17/M18 with Romeo1Pro/DPP Cut to Trijicon RMR/SRO, Holosun 407C/507C/508T/507 Comp, Anodized Finish, Black, Includes Mounting Hardware and 10-8 Rear Sight SGX-RSH-10-8 The C&H Precision plates are designed" manufactured and shipped from their small family owned business in Coastal Georgia. Each plate is precision machined to the tightest tolerances on HAAS CNC machines and each plate goes through multiple quality checks before shipping to our customers.