Trijicon ACOG BAC 4x 32mm Rifle Scope - Horseshoe Dot - ACOG 4x32 Scope with Green Horseshoe BAC Reticle- includes Flattop Adapter. Features dual illumination (Fiber optics provides daylight illumination and tritium illuminates reticle at night). The ranging reticle is calibrated for 6.8 SPC flattop rifles out to 800 meters. 4x zoom Fiber Optic and Tritium illuminated Bullet drop compensating for 6.8mm special