Mounted using one screw, (6-48) this one piece ramp/fiber optic sight could be the answer you are looking for. Available in two heights (.405" & .470"). Made from solid steel with a blue finish. Available for barrel contours .625", .750" and .875" Heights are measured from the top of the barrel to the top of the sight. Orange 3/4" long FIBER OPTIC ROD gives the shooter a glowing "dot" that shows up well in dim light. These sights cannot be changed in height so it is important to know the exact height needed for your rifle/load/shooter combination. This will only be determined by shooting your rifle with the Skinner Rear sight in place (on paper) BEFORE ordering this sight.No Returns on Uni-Ramp sights unless the sight itself is defective. Fiber Optic Rods can break and are not considered "defective."