Question: what does 2 moa red dot mean?
Answer: The size of the dot is measured in minutes of angle (moa), with 1 minute of angle being equal to 1 inch @ 100 yards (approx.). Example; a 2 moa module will produce a dot that will cover 2 inches of your target @ 100 yards, a 6 moa module will cover 6 inches, and so on.