ACOG 3.5x35 scope with Red Crosshair Reticle-the ranging reticle is calibrated for 7.62mm (.308 Cal.) flat-top rifles to 1200 meters. Includes flat top adapter. Daytime illumination is provided by fiber optics and tritium illuminates the scopes at night. Features: - 1 Flattop adapter for military style rail - 1 3.5x35 Scopecoat - 1 lens pen - 1 Trijicon logo sticker - 1 ACOG BAC manual - 1 warranty card. Specifications: - magnification: 3.5x - objective size: 35mm - bullet drop Compensator: yes - length: 8" - weight: 14.0 oz. Without mount - illumination source: fiber optics & tritium - reticle pattern: Crosshair - day reticle color: Red - night reticle color: Red - calibration: 0.308 - eye relief: 2.4" - exit Pupil: 10mm - field of view (degrees): 5.5 - field of view at 100 yards: 28.9' - adjustment at 100 yards (clicks/in): 3 - mount: TA51 - mount comes with: TA51 - housing material: forged aluminum - color: black.