The Leupold Mark 4 3.5-10x40 LR/T M3 Rifle Scope incorportes the best features of the Leupold Mark 4 M3 and VX-III scopes, the Leupold 3.5-10x40mm LR/T M3 features a Mil Dot reticle and M3-style adjustment dials that are specially calibrated and interchangeable for bullet drop compensation. Adjustment increments of 1 MOA elevation and ½ MOA windage allow for easy adjustment. A side parallax adjustment dial allows parallax elimination from a shooting position. Leupold Mark 4 3.5-10x40 LR/T M3 Mil Dot Rifle Scope Product Specifications Actual Magnification: 3.2(3.5x) 9.5(10x) Length (in): 13.50 Eyepiece Length (in): 3.2 Objective Length (in): 4.30 Objective Diameter (in): 1.80 Eyepiece Diameter (in): 1.60 Tube Diameter: 30mm Weight: 19.5 oz. / 553 grams Eye Relief (in): 4.7(3.5x) 3.4(10x) Eye Relief (mm): 119(3.5x) 93(10x) Obj. Lens Diameter: 1.575in / 40mm Max. Adjustment @ 100 yds (in): 65 Max. Adjustment @ 100 m (cm): 181 FOV @ 100 yds (ft): 29.9(3.5x) 11.0(10x) FOV @ 100 m (m): 10.0(3.5x) 3.7(10x) Ring Spacing Max. Mount Ring Spacing (in): 6.20 Front Ring Space (in): 2.40 Rear Ring Space (in): 2.40