Vector Optics Maverick-IV 1x20Feature Extreme Compact Size Only 68mm 2. 7in Length, Solid and Light Weight Rubber Armored NBR+PVC Material 55C to 70C Mil Standard in FDE Finish 3MOA Dot Size with Digital Control 10 Levels Red Dot Intensity, Cantilever Mount Unlimited Eye Relief, Parallax Less Than 3MOA (@ 50 Yards), IP67 Water Proof 41mm 1. 6in From the Bottom to the Red Dot Sight Center Lower 1 3 Co Witness 1MOA Adjustment with Audible Click, More Than 45MOA Adjustment Range