If you are trying to go timmie, the RMR makes sense, otherwise the SRO is a far superior gaming optic, due to its much larger display. Previously, the RMR was used by +/- 5 percent of CO competitors at USPSA Nationals, and now the SRO is one of the most commonly used optics. I ran a SRO on a P10F OR model, using a CZ Custom RMR plate, and it worked great.