OPF-G, RMR, OPF-P320, RMR, OPF-P32, RMR, RSD, OPF-SW, RMR, OPF-S, RMR, OPF-VP9, RMR, OPF-PDP, RMR (v1 and v2) are all compatible with RCR, RMR HD, RMR and SRO.
For RCR, Trijiocn supplies 3 sets of screws, but they're unmarked, we have a quick way you can use to tell them apart.
OPF-G, RMR: 6-32
OPF-SW, RMR: 6-32
OPF-S, RMR: 6-32
OPF-P320, RMR, RSD (rear sight dovetail): 6-32
OPF-P320, RMR, 6-40 long
OPF-FN509T, RMR: 6-40 long
OPF-PDP, RMR (v1 and v2): 6-32
OPF-VP9, RMR, 6-32
It would be a good idea to finger tighten the screws first without the RCR to confirm in case screw lengths change.