The Styrka S3 Red Dot Sight is the ideal red dot for the hunter or shooter. The S3 is feature rich with superior optical quality and a durable aircraft grade aluminum construction that can that stand up to hard use. The double lens optical system coupled with dot color indexed coatings virtually eliminates parallax and point of aim errors. Six brightness settings allow the dot to be set to the optimum intensity setting that best suites the shooting conditions, while features like auto shut off prevent the frustration of a drained battery. This tube style red dot is equally at home when used on tactical platforms and handguns or when mounted to a shotgun or rifle for hunting and field use chasing turkeys or big game. All models are fully waterproof and nitrogen purged for use in any weather condition. The Styrka S3 Tube Style Red Dot Sight is the perfect choice for those that want a smaller dot size to cover less of the target and for extra precision.