Barrett 13353 BORS Range System for Leupold Mark 4 M1 Scopes

The Barrett Optical Ranging System (BORS) is an exciting new innovation in long range shooting. The integrated electronic ballistic computer couples directly to the Leupold Mark 4® rifle telescope acting as the upper rear scope ring.
Measures air temperature, barometric pressure, and bore line angle
Calculates a ballistic solution for a specific user-selected cartridge
Eliminates the need for "counting clicks", calculating mil dots as target ranges change, or using a handheld computer
Allows the shooter to focus on environmental conditions, assess the tactical situation, and quickly engage multiple targets at varying ranges
Takes the mystery out of bullet drop

BORS fits these scopes:
Leupold Mark IV 3.5-10x40mm LR/T M1
Leupold Mark IV 4.5-14x50mm LR/T M1
Leupold Mark IV 6.5-20x50mm LR/T M1
Leupold Mark IV 8.5-25x50mm LR/T M1
Leupold Mark IV 8.5-25x50mm ER/T M1 - This model (66000-8SYS) is now compatible with illuminated models.
BORS includes Barrett Ballistic Software, USB to BORS data connection cable, 100 preloaded cartridge table, tool kit and CR-123 lithium battery. Scope is not included.
*Be sure to check out the Similar Products tab to find parts which are compatible with this BORS unit.