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. For Converting the SIG P320 RX/Pro Series/AXG to the Holosun 407K/507K Plates Are Made from 6061 Aluminum Stainless Steel Mounting Hardware Made in the USA