Viridian Weapon Technologies is devoted to applying cutting-edge technology to design compact"" powerful self-defense products for the civilian"" military and law enforcement markets. Viridian's GDO30 green dot features a true 1/3 co-witness sight picture for use with your backup iron sights when using their quick detach riser mount. With unlimited eye-relief and true parallax free"" this green dot will be the perfect fit for your favorite rifle or shotgun.