Trijicon ACOG 3.5x35 BAC Rifle Scope - ACOG 3.5x35 scope with Green Horseshoe BAC Reticle and Target Reference System-the ranging reticle is calibrated for 5.56 (.223 cal) flat-top rifles to 1000 meters. Includes Flat Top Adapter. Daytime illumination is provided by fiber optics and Tritium illuminates the scopes at night. Thumbscrew Flattop Adapter (TA51); 3.5x35 Scopecoat (TA63); LENSPEN (TA56); Lanyard Assembly for Adjuster Caps (TA71E); Trijicon Logo Sticker (PR15); ACOG BAC Manual;