This comprehensive review by retired SGM Karl Erickson compares top combat pistol optics: Trijicon RMR, Aimpoint ACRO, Holosun 507/509, Vortex Defender CCW, and Primary Arms Vulcan. Key evaluation factors include battery life, glass clarity, window size, and extreme durability. The discussion highlights the evolution from iron sights to red dots and the benefits of enclosed emitters for harsh environments.
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