Trijicon RMR and Crosman's 3200S 11mm. Dovetail

[Drdan]

The 2300S comes with a rear Williams notch sight affixed to the breech on its 11mm. dovetail and a front muzzle brake with a post sight.  The Williams sight can be easily removed, and a  Leupold 2.5X20 or 4X28 can handily be attached to the 11mm. dovetail. 

What would be the simplest way to attach a Trijicon RMR red dot to the pistol which allows me to easily change to these other optical options? I will be shooting the pistol indoors with a DonnyFL Sumo muzzle brake, so please take this into consideration.

Thank you very much for any input. 

[Drdan]

I would be willing to have the airgun's breech milled to accept a mounted plate if that's the only viable solution allowing for a low profile of the red dot; making sure that the muzzle brake doesn't interfere with its function...