Selecting a nitrogen-purged and O-ring sealed model will eliminate that issue by making the sight waterproof and fogproof. Red dot sights apply many different lens coatings, with some of the more ...

Leupold & Stevens, Inc., has introduced the all-American-made Freedom RDS (Red Dot Sight), a new tubular red ... The RDS is 100 percent fogproof and waterproof and features 80 MOA of adjustment ...