According to their home page, yes:

"Hardware-wise, is stand-alone self powered, with hardware compatibility for mount on 5U module format; you can use in stand alone with its internal power, or you can install in your Dot.com/Cotk/Moon Modular system. R24 respects electrical and mechanical standards for the above manifacturers. Still, you can use R24’s own cabinet as a “presto-cabinet” for powering and using your spare 5U modules."