Description Made for use on CVA muzzleloaders and rifles manufactured after 2001 - 2009. DuraSight makes it easy to mount the sights on compatible rifles with just two screws. Sight your rifle in faster no matter what the lighting conditions are. Durabright⢠Fiber Optic Sights give you dramatically increased visibility and durability. Front and rear sight combo helps you sight in on target, even in fading light or against a low-contrast background.Fits Most CVA Muzzleloaders: 2001 - 2009 CVA MUZZLELOADERS & RIFLESFiber Optic Diameter: .055"