The Trijicon RMR HD is the next generation of RMR, with an adjustable LED that supports both a 1.0 MOA fine dot and a 55 MOA circle reticle. Toggle between them depending on the engagement: fine dot for precision, big circle for close-range fast work. Same RMR footprint as the legacy RMR Type 2 line.
Specs:
RMR HD vs RMR Type 2: The HD's killer feature is the dual reticle — most other optics make you choose. The 1 MOA precision capability stays on tap for accurate work; the 55 MOA circle is there when speed matters more. The HD also extends battery life and adds clearer glass over the Type 2 generation.