The Sportsmans Guide does it to me again. Had to have this, not sure why. (Great thing about America huh) In any case here it is. Redfield model 800625 ESD(Electronic Sighting Device). 30MM tube, It has four different size dots and eleven intensity settings. I will sight it in and give a report in a day or so. This is my first foray into red dot sights so any advice is more than welcome. The handgun is a S&W 610 Classic