The term “zero” means finding a sight setting that, under some set of conditions, results in a centered shot group. Those conditions include distance, ammunition, and event. Other variables that factor in include rifle, temperature, atmosphere, place, yet the list can continue.
Temperature can have a significant effect on the zero of your firearm. Our advice: Never pass up a chance to sight-in and confirm your zero!
The patent, titled “Visual Targeting Apparatus and System,” is for the optical technology used in the Axeon Second Zero accessory.