An optical bow sight which can be accessorized with an adjustable range sighting pin or torque and cant compensation or both of these features, but is fully functional without either accessory. The optical sight has a shrouded array of fiber optics sight pins which are removable from the sight housing with their support as a single unit. The sight pins are clad in a metallic glass because of the corrosion resistance of such materials. Light collected over a wide field falls on segments of the sight pin fibers coiled in the housing of the optical unit or falls on a trap which redirects the light onto the fiber segments. A lens may optionally be employed to promote the collection of ambient light, and a shutter or variable size aperture may be provided to control the light reaching the sight pin fibers. An elastomeric damper can be advantageously mounted on the sight to minimize accuracy effecting shock and/or vibration, and a level bubble may be provided to aid in avoiding cant of the bow to which the sight is mounted.