If you are an airgun enthusiast, this kit will change everything! The Absolute MOA Digital Conversion Kit is precision engineered to produce extremely accurate, quick, and repeatable adjustments for long-range shooting requirements. Extremely beneficial when shooting with low velocity projectiles such as air gun or rimfire rifles. By placing a digital drop gage at the precise position from the pivot of the base, it calculates 1 MOA elevation per .001 readout on the drop gage. It replaces the need for counting (or miscounting) revolutions on your scope and base turrets with an accurate digital readout system. Just zero out the base, set the drop gage to zero, and adjust your base to your required MOA.