The C&H Precision plates are designed, manufactured and shipped from our 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. SPECIFICATION: Material: Plates are made from Mild Grade steel. All mounting hardware is Stainless Steel Finish: Plates are Electro Deposition Painted - Black INCLUDED: Qty 1 - Optic Plate Qty 3 - M4 x 6 MM Plate Mounting Screws Compatible FirearmsP320 Full-Size, SIG P320 AXG Carry, SIG P320 AXG Combat, SIG P320 AXG Legion, SIG P320 AXG Pro, SIG P320 Compact, SIG P320 RX / Pro Series / AXG, SIG P320 RXP Compact, SIG P320 RXP Full Size, SIG P320 RXP XFull Size, SIG P320 RXZP, SIG P320 Spectre Comp, SIG P320 Spectre COMP Blackout, SIG P320 XCompact, SIG P320 XFive DH3, SIG P320 XFull, SIG P320 XFull California Compliant, SIG P320 XTen, SIG P320 XTen Comp, SIG P320 XTen Endure Compatible OpticsHolosun 509T