CVA Durasight Fiber Optic Muzzleloader Sights - 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. Guaranteed for life!