Single transverse 123 battery to reduce sight length Shortened base only requires at most 2 3-4" of rail space compared to the 4" N battery sights Battery cap and latch are eliminated and replaced with a simple O-ring, tethered cap; better sealing is achieved Battery compartment is now 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 600 hours Night Vision compatible