Trijicon ACOG 6x48 Machine Gun Optic, Dual Illuminated Amber Chevron .223 Ballistic Reticle, 6.5 MOA RMR Sight, and TA75 Mount Powered by Trijicons patented fiber optics and tritium-based technology Bullet drop compensator (BDC) with additional aiming points estimated for trajectory of the 7.62mm M80 out to 1200 meters Incorporates Trijicons Bindon Aiming Concept(BAC)  a revolutionary both-eyes-open method of aiming Battery free and waterproof to 500 feet. Eye Relief (inches): 2.7 Features an 8.0 MOA RMR.