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Run a tube style dot on several guns, either solo or cowitnessed with the irons. Bushnell TRS25 or AT3 RD50, both basically the same but 2moa dot in the at3 unit vs 3 in the Bushnell. Change the battery once per year whether it seems to need it or not - testing I found a new battery could be left turned on for over 6 months and still work
Note that dots and astigmatism dont get along for many
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