Sightron S-TAC Rifle Scope w/ Tactical Knobs 4-20x50mm 30mm Tube First Focal Plane IR MOA-3 Reticle Zero Stop Black Medium. It is equipped with a easy to set Zero stop and an 11 position on/off illumination switch mounted within the side focus knob. The MH-4 offers 12 MRAD of windage and 22.9 MRAD of elevation adjustments. A unique flip-up lever is built into the power ring for easy adjustments on cold days. Specifications for Sightron S-TAC 4-20x50mm 30mm Tube Rifle Scope w/ Tactical Knobs First Focal Plane: Manufacturer: Sightron Objective Lens Diameter: 50 mm Magnification: 4 - 20 x Reticle: 3 MOA Tube Diameter: 30 mm Reticle Focal Plane: First Focal Plane (FFP) Color: Black Adjustment Type: MOA Battery Type: CR2032 Shockproof: Yes Included Accessories: Lens Covers CR2032 Battery Key for Knobs Magnification Type: Variable Additional Features: Zero Stop Condition: New Package Contents: Sightron S-TAC 4-20x50mm 30mm Tube Rifle Scope w/ Tactical Knobs First Focal Plane Sightron 26019: S-TAC Rifle Scope w/ Tactical Knobs 4-20x50mm 30mm Tube First Focal Plane IR MOA-3 Reticle Zero Stop Black Medium