Offering true two eyes open shooting, a transversely-mounted lithium 123 battery and 7mm raised base offering iron sight access, the new EOTech EXPS2 features easy-to-adjust side buttons and a single quick-release throw lever for easy attachment and removal. The lens features an anti-glare coating and is free of parallax. Additionally, the holographic sight is waterproof, fogproof and shatter-resistant for ultimate durability. With return to zero repeatable within 2 MOA after re-mounting, youâ€™d be hard-pressed to find a better dot sight. Finally, the EOTech EXPS2 utilizes a 65 MOA circle with 1 MOA aiming dot reticle to allow for fast target acquisition and precise shooting.