Barrett Optical Rnaging System is an integrated electronic ballistic computer that mounts directly on a riflescope and couples to the elevation knob. Turn the elevation knob until the LCD displays the target's range. Three internal sensors automatically calculate ballistic solutions. Compensates for uphill and downhill shooting, temperature, barometric pressure changes and rifle canting. Four button keypad operation. Includes software, USB connection cable, 30mm Zero-Gap scope rings, tool kit, CR-123 battery and 100+ preloaded cartridge tables. Weighs 13 ounces. Offered for select compatible scopes.
Barrett Optical Ranging System With 30mm Rings 66000-1SYS - for Non-Illuminated Leupold Mark IV Scopes with M1 Turrets, LR/T and ER/T models for the 3.5-10x40, 4.5-14x50, 6.5-20x50, and 8.5-25x50. Ultra High Zero-Gap rings included.