The Micro S-1 is Aimpoint's adaptation of the popular Micro red dot sight specifically for mounting on shotguns. Its innovative carbon fiber reinforced mounting system adds the bare minimum of additional weight, so it won't upset the balance of your shotgun. And it positions the Micro S-1 at the lowest possible optical axis to align it naturally with the bore of the gun and keep in line with the traditional shotgun sighting stance of looking down the top of the barrel. Aimpoint designed the Micro S-1 to give hunters and sporting clay shooters course a big boost in hit percentages, and its compact, low profile makes it an excellent enhancement for shotgun hunters, too. The Mfg: Aimpoint