Trijicon ACOG Dual Illum Crosshair .300 Blackout Ballistic Reticle, 3.5X 35mm, Red Magnification: 3.5x Objective size: 35mm Illumination source: fiber optics & tritium 3.5x magnification with a 35mm objective lens Red Crosshair BDC reticle Bullet Drop Compensator reticle for the AAC .300 BLK Forged aluminum housing Made in the USA