C+H Precision Steel Adapter Plate SIG P320 X-Series / Legion w/ Romeo1Pro / DPP Cut Compatible with Aimpoint ACRO (STEEL) 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 The C+H Precision plates are Made in the USA. 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. Most of our plates feature a patented stainless-steel T-Nut which provides an industry leading six to seven threads of engagement. Since all the mounting hardware is replaceable, if any mounting hardware is damaged it can be replaced without replacing the entire plate.