Trijicon ACOG TA31-D-100196 Nickel Boron Dual Illuminated Red Horseshoe Dot .223 BAC Reticle with TA51 Mount, 4X 32mm 4x magnification with a 32mm objective lens Red Horseshoe BAC reticle Bullet Drop Compensator reticle for up to 800 meters Nickel Boron finish Forged aluminum housing