This guide, based on insights from Brownells' Steven and Caleb, details the situational necessity and installation of backup sights on an AR-15. It covers considerations for range versus defensive use, different cowitnessing methods (absolute vs. lower third), and the importance of redundancy in optics for critical applications. The expert advice emphasizes that while not always mandatory for a pure range gun, backup sights are highly recommended for any serious-use firearm.
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