Bushnell Holosight 510021 [3/21] On off brightness adjustments switches
Bushnell Holographic : r/ar15
World's First Holographic Sight - YouTube
EOTech 518.A65 Holographic Weapon Sight, AA battery; QD mount, units with buttons located on left side of unit; reticle pattern with 68 MOA ring & 1 MOA dot - Dana Safety Supply
⁰What Are the Exact Differences (If Any) Between Bushnell Holosight and EOTech? | Northwest Firearms