This EOTech 300 Blackout with a 2-dot ballistic drop reticle was designed for tactical shooters allowing the shooter to zero either subsonic or supersonic rounds in the same reticle pattern. The 300 Blackout has a small size, lightweight, and the battery configuration opens up more space on the rail. EOTech USED Single CR123 battery; 2-dot reticle with .300 Blackout ballistics on hood XPS2-300 - Excellent Condition UA7368