Airsoft Pistol Accessories RMR Style Adjustable Reflex Red Dot Sight 3.25 MOA Scope for Hunting Scopes Fit 20mm Picatinny Rail 

Clear aperture(mm):50

Parallax adjustment-range(side focus):100yards

Eye relief(mm):96

Eyepiece-diopter(min):2

Eyepiece+diopter(min):2

Field of view low power/ft@100yds:32.5

Field of view high power/ft@100yds:10.8

Reticle Adjustment at 100 yards per Click:0.25"

Windage travel-total:60

Elevation travel-total:40

Main tube diameter(inch):1

Overall length(inch):12.40

Front mounting distance(inch):1.78

Rear mounting distance(inch):2.20