The konus atomic-r is a lightweight and compact red dot sight with tactical turrets.Features 11 reticle brightness settings, tactical turrets with turret covers that allow you to adjust the turrets and unlimited eye relief.Includes cr1620 battery and dual mount that is suitable for both 7/8" and 3/8" rail.Battery: CR1620Magnification: 1xObjective: 20mmField Of View: 10.7 m at 100 M- 36.1 yds at 100 ydsEye Relief: UnlimitedDot Size: 3 MOALength: 2.75"Weight: 4.37 ozFinish: BlackReticle: 3 MOA Red DotAdjustment Size: 1.0 MOAProofs: WaterproofOptic Coating: Multi-CoatedWindage Elevation: Adjustable