I have a Bushnell TRS-25 w/ 3MOA dot that has done tours on my AR, Benelli and 308 scout rifle, gotten wet, dropped, left on for weeks, and it's still going hard on it's first battery, a few years in. no fancy auto brightness or anything but you can make it blindingly bright if you need to, and dim enough to not flare in the middle of the night.
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