The Trijicon RMR HD with the 3.25 MOA dot — same dual-reticle technology as the 1.0 MOA HD variant, but with the mid-size dot most carry shooters prefer. The 55 MOA circle is selectable as a secondary aiming aid for fast close-range work; the 3.25 dot covers everything else.
Specs:
The 3.25 + 55 MOA combo: This is arguably the most useful RMR HD configuration. The 3.25 dot is the carry/duty standard, and the 55 MOA circle gives you a "use the circle, find the dot" startup — fast-acquire with the circle, refine with the dot. Single optic, two aiming pictures.