Optical instruments, namely, telescopic gun sights for rifles, pistols, handguns and shotguns; ballistic range finders for calculating bullet drop; telescopic riflescopes; spotting scopes; range finding binoculars; optical rangefinders, laser rangefinders; prism sights, reflex sights; red-dot sights, and smart rifle sights all being telescopic gun sights; optical zoom multipliers; bore sighters for firearms; binoculars and monoculars.