C&H Precision Weapon Systems (CHWPS) GL-RSH GLOCK MOS kit for Trijicon RMR / RMR footprint Holosuns. NOT for TRIJICON RMRCC and NOT for 43X MOS or 48 MOS.

GL-RSH.  Fits Trijicon RMR/Holosun 407C, 407C V2, 507C, 507C V2, 508T and 508T V2
CHPWS adapter plates has evolved over the past five years because the OEM mounting plates are the weakest link in the Red Dot System.
Patent Pending replaceable stainless steel T-Nuts and stainless steel Torx® head screws which are used to mount the RDS (Red Dot System) to the plate, giving you the ability to replace the mounting hardware without replacing the entire plate.  Six to seven full revolutions of thread engagement for maximum retention.