Yes all of the 407C / 507C / 508T units use the RMR footprint and can be mounted on RMR interfaces without any additional parts. The HE509T doesn't have the RMR footprint on the sight itself but comes with an RMR adapter plate in the box, Holosun state that the included 509T RMR adapter plate is not compatible with ZEV or Shadow Systems style RMR interfaces.