O'Malley's weapon aiming system
Offset accessory mount
Offset attachment for use with a firearm scope
Operating element for a telescopic sight
Optical imaging device for firearm scope attachment
Optical sight
Optical sight apparatus for firing from cover positions
Optical sight having a glow-in-the-dark aim indicator
Optical sight system with wide range of shooting distances
Optical sight with switchable reticle
Optical sighting devices
Over barrel gas tube optical sight mount
Overlapping cover for guns with extended magazines