Trijicon ACOG TA31-C-100198 Nickel Boron Dual Illuminated Red Crosshair .223 BAC Reticle with TA51 Mount, 4X 32mm 4x magnification with a 32mm objective lens Red Crosshair .223 BAC reticle Bullet Drop Compensator reticle for up to 600 meters Nickel Boron finish Forged aluminum housing