My two RXMs
One has the NVOKE Voyager frame. Love it, way better than the stock magpul frame, and not as expensive as the aluminum frames that are floating around. Magwell, and beavertail are highlights, along with the texture. The only change I might make is a different mag release, and a light.
The second has the JL Billet Reaper Chassis. Absolutely love this thing. Even if I had issues installing (tbh I'm now convinced this was user error.) Still shopping around for a light on this one as well. Since the rail is shorter, I want something that fits nicely.
I swap the OEM 4.5inch slide, with a Osight XR, and the advantage arms 22lr conversion slide between the frames. Had a lot of fun today on the range. Put about 1000 rounds through each in 9mm, and a little bit less in 22lr.