The Barrett Optical Ranging System (BORS) is an integrated ballistics computer that mounts directly on the riflescope and couples to the elevation knob. BORS instantly takes care of the data work by drawing from several tables and taking into account a number of real-time external factors so you can focus on the task of achieving first round hits.
After determining the range to target, simply turn the elevation knob until the BORS screen matches your target's distance. Internal sensors automatically calculate the ballistic solution. BORS compensates for temperature and barometric pressure, calculates angle cosine and displays rifle cant.

Specifications and Features:
Barrett BORS System 12982
Battery Life 40 Hour
CR-123
Display is two lines with 12 character LCD
3.25"x2.49"
13 ounces
Matte Black

Includes:
Barrett BORS Ballistic Software
USB to BORS data connection cable
100 preloaded cartridge tables
Tool Kit
CR-123 lithium battery
Fits:
Nightforce NXS 5.5-22 High Speed .25 MOA Scopes Only