This is a wonderful light weight sight for all types of shooting, especially close in. It is the perfect sight for mounting on a shotgun when hunting turkeys - it can even be used on bows! Just turn the sight on and a bright red dot appears in the center of your scope. You can adjust the brightness of the dot, depending on the brightness of your surroundings, with the eleven position click rheostat. All BSA Red Dots are made with integral rings and attach to any weaver style mounts.