This video explains how to field zero an IR laser for night vision use, even when live-fire confirmation at night is impossible. The technique involves using a "bucket and a quarter" during the day to establish a zero that can be relied upon for subsequent night engagements. This is presented as a solution for when your primary night-fighting weapon is unavailable and you must utilize an unfamiliar firearm with your existing night vision equipment.
This video promotes the Double Shoot App as the ultimate solution for zeroing firearms. The description highlights it as the best zeroing solution on the market and provides a website link for more information. The app appears to be designed to simplify and improve the process of aligning a firearm's sights with its point of impact.
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