Optical Bore Sight

A telescopic device which utilizes a boresighting reticle, used to align the axis of a weapon bore with a target. It is secured to the exterior or interior of a weapon barrel or tube. It includes a mount, telescope with a strap and clamp assembly for exterior mounting, or an expansion sleeve adapter for internal mounting. Excludes sight, bore, breech; sight, bore, muzzle and sight, bore, open.