These AR15 Rifle Scopes are tailored to MSRs, providing quick engagement and target acquisition with their MSR BDC8 illuminated reticle and removable thread-in throw lever for fast magnification changes. They have 0.5 MOA adjustment increments and a 44 MOA travel-per-rotation. At 100 yards the FOV (Field of View) is 124.8 on low power and 19.6 on high power. The diopter adjustment range is +/- 2.5, with 11 illumination settings. SIG SAUER brings industry-leading light transmission and optical clarity for any situation. Long known for their handguns and rifles, as soon as they moved into the optics industry they dominated. Specifications for SIG SAUER TANGO-MSR LPVO 1-8x24mm Rifle Scope, 30mm Tube, Second Focal Plane (SFP): Manufacturer: SIG SAUER Objective Lens Diameter: 24 mm Magnification: 1 - 8 x Reticle: BDC-8 Tube Diameter: 30 mm Reticle Focal Plane: Second Focal Plane (SFP) Exit Pupil: 3.4 - 11 mm Illumination Color: Red Finish: Hardcoat Anodized Field of View, Linear: 19.6 - 124.8 ft at 100 yds Eye Relief: 3.74 - 3.93 in Diopter Adjustment Range: -2.5 - 2.5 dpt Weight: 18.6 oz Adjustment Click Value: 0.5 MOA Adjustment Type: MOA Parallax: Fixed Illumination Type: LED Battery Type: CR2032, Lithium Metal Lens Material: Glass Optical Coating: Spectracoat Brightness Settings: 11 Weather Resistance: Yes Water Resistance Level: IPX-7 Shockproof: Yes Fogproof: Yes Battery Quantity: 1 Magnification Type: Variable Condition: New W/E Travel at 100 Yds: 100 MOA Attachment/Mount Type: Cantilever Mount Features of SIG SAUER TANGO-MSR LPVO 1-8x24mm Rifle Scope, 30mm Tube, Second Focal Plane (SFP) High Performance 8x optical system with low dispersion glass Integrated thread in throw lever for quick magnification changes Illuminated MSR BDC-8 reticle with 11x brightness levels Dependable waterproof, shockproof, and fog-proof performance Package Contents: SIG SAUER TANGO-MSR LPVO 1-8x24mm Rifle Scope, 30mm Tube, Second Focal Plane (SFP) Lay Flat Flip-Back Lens Covers ALPHA-MSR 1 Piece Aluminum Cantilever Mount