BARR BORS FOR LEU M4 M1

The Barrett Optical Ranging System (BORS) is an integrated ballistics computer that mounts directly on the riflescope and couples to the elevation knob. drawing from thousands of tables and taking into account a number of real-time external factors, it automatically gives the shooter the exact yardage at which a bullet will hit.Once the distance to the target has been estimated, the computer can be put into action by simply turning the elevation knob until the LCD displays the targets range. The BORS kit includes the Barrett Ballistic PC Software that's pre-programmed with a library selected by Barrett and a BORS data cable that allows the user to program custom loads on a personal computer and transfer them directly to BORS.