The scope facilitates the viewing of long range items and precise aiming of the laser beam. When using high quality laser devices that emit a small laser any movement will usually net you an incorrect reading or no reading at all. Most of them are tapped on the bottom side for mounting on a tripod or camera fitting mount to keep its movement while in use to a minimum.
Its not meant to be mounted on a fire arm its meant to be used as a stand alone system.
John Burns from Best of the West uses a similar if not the same LRU device.
Its a high quality device capable of extreme ranging and accurate repeatability. Other units exist and prices only go!