I call it the HK cul de sac. Or for the crew I run with who don't speak French, the HK dead end accessory road.
If you don't mind a zero retention holster, then you have some options. If you want an RMR because they are better than irons only for many reasons, then you still have some holster options. If you want an RMR, and a mounted light, then you are running out of options. If you want an RMR that is covered, a weapon light, and retention, then you going to have to have few options. If you want to take this gun to the state of the art and run a comp, as well as a covered RMR, a mounted light, tall irons, and have retention, then you are in custom holster land and you need to find that holster maker, get it spec-ed out and ordered because there will be a wait.
That additional height can be attributed mostly to the interface plate -- an unfortunate byproduct of compatibility.
An aside about RMR pistol shooting: when using a suppressor, I tend to eventually (after a few mags) get carbon build up on the lens from the ejection port which can be a pita to deal with. This seems to happen faster shooting 45acp.
Hokey religions and ancient weapons are no match for a good blaster at your side, kid.
I will argue that you should put the RMR on the gun you plan to carry. I will say that to higher performance shooter, the grip differences between the P2000 and P30 can definitely make a difference, @GJM has described his experiences before, where he found the P2000's more brick-like grip to provide better grip than the more sculpted grip of the P30.
I have had RMRs on my P30LSes for years, and recently switched to ACROs, I am a huge believer of RDSes on handguns.
I wish the ACRO’s battery life wasn’t so stupid. Nice optic, I put them on a pair of USCs turned UMP. Very compact and robust, but tiny little battery that dies too frequently for a gun that isn’t for fun and needs to have the dot on at all times.
Yes I am used to the Glock 17 with co-witness sights that will be major in my decision.
Support “The Collected Wisdom of Jim Schatz “G3Kurz”