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.Features : For Converting the Glock MOS (Not the Glock 43x/48 MOS) to the Holoson 507C/407C/508C/508T Plates Are Made Polymer Stainless Steel Mounting Hardware Made in the USA Not Compatible with Large Frame Glock (20/21), Modification required to fit G40