This review tests the Holosun HE503R-GD red dot sight's durability against extreme recoil from a .50 BMG rifle and submersion in water. The "Gold Dot" reticle is an amber color, which the reviewer subjectively found pops easier. The sight's operation involves a unique brightness knob that also cycles through reticle patterns (dot only, or circle with dot) by reaching a final detent position.
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