I needed a scope for my 10/22 Bull barrel rifle. I found one on EBay. A Red Field 6x18. With a buy it now for $125.00. It’s an older 5 Star Red Field with a built in Manuel range finder. I under stand the more you zoom in the higher the yardage on the range finder goes and some how the two horizontal lines up top have something to do with setting the range. It has a tactical turret for the horizontal cross hair to move up and down as to your range. Has anyone ever seen or messed with one?