EOTech Model EXPS3-0  Night Vision Red-Dot Sight

Offering true two eyes open shooting, a transversely mounted lithium 123 battery, and 7 mm raised base offering iron sight access, the Extreme-XPS (EXPS) features easy to adjust side buttons and a single, quick release throw lever for easy attachment and removal. Single transverse 123 battery to reduce sight length. Shortened base only requires at most 2.75″ of rail space compared to the 4 inch N battery sights. Battery cap and latch are eliminated and replaced with a simple O-ring, tethered cap; better sealing is achieved. This model is waterproof to 10 meters. Battery compartment is separated from the base to allow it to hover over the delta ring of the rifle. Average battery life at brightness level 12 is roughly 500-600 hours, 3x battery life of N cell sights. Side buttons, NV compatible with a single quick detach throw lever.