Trijicon RMR vs Holosun — which pistol red dot?

Both are good; it is about how hard you will use it. The RMR is the proven duty standard — brutally tough and the footprint everything else copies — but it costs more and the battery is bottom-loaded (you re-confirm zero to change it). The Holosun gives you 90% of the durability, more reticle options, and a no-zero-loss battery tray for much less. Hard duty use: RMR. Everyone else: the Holosun is the smart-money pick.