No, the Riton Tactix MPRD 2 Micro uses the Shield RMSc footprint while this mount will only accept optics with the Trijicon RMR footprint. You would be able to use the Leupold Deltapoint Pro Cross Slot Mount, which can be found by using the link below:
https://www.opticsplanet.com/leupold-deltapoint-pro-cross-slot-mount.html
The Leapers UTG Super Slim Picatinny RMR Low Profile Mount will include #8-32 Flat Head T20 Torx and #6-48 T10 Torx Screws as well as a T20 and T10 torx wrench.
Holosun's optics can be easy to mistake. Their 'C' models fit the RMR, which would work on this mount. The 'K' models, like yours would fit a modified shield footprint. I am linking one that can be made to fit. The Holosun 'K' models will not fit the corner posts so they would need to be modified. There are no mounts made specifically for the Holosuns unfortunately.
https://www.opticsplanet.com/leupold-deltapoint-pro-cross-slot-mount.html
Yes, it "Includes RMR Mounting Screws and Installation Tools for a Simple and Friendly Installation."
No, the Viper does not share a mounting pattern with the RMR.