Trijicon 4X 32 ACOG Green LED .223 Crosshair Reticle with TA51 Mount 4x Magnification 32mm Objective Size. Field of view @ 100 yards (feet): 36.8 Forged aluminum housing 4x magnification with a 35mm objective lens Green Crosshair BDC reticle Bullet Drop Compensator reticle for .223 flattop rifles Uses 1 AA Battery Forged aluminum housing