The HWS EXPS3™ is an excellent choice for professionals and avid shooters alike. The EXPS3 offers true two eyes open shooting for fast target acquisition. Its night vision compatible settings allow for passive use under night vision while its wide target window allows for a clear field of view through the optic making it easier to acquire in all lighting conditions. By default the EXPS3 comes with a 7mm raised quick detach base for lower 1/3 iron sight co-witness. When paired with the Unity FAST Riser the optic will sit at a 2.26 centerline allowing for it to be used with any Unity Tactical Flip to Center Magnifier. This allows for a more neutral head position and easier acquisition of the sights when using Night Vision or CBRN equipment. The control buttons located on the side of the device allow for easy access, particularly when pair with a magnifier. Specifications:Night Vision CompatibleL X W X H 3.8" x 2.3" x 2.9" (96.5 x 58.4 x 73.7 mm)Weight 11.2oz (317.5g)Water Resistant 33ft. (10 m) depthMount 1" Weaver or MIL-STD-1913 railWindage & Elevation Adjustment 0.5 MOA per clickBrightness 20 daylight settings10 additional settings for Gen I through III+ night vision devicesPower Source 1 x CR123 batteryBattery Life 1,000 continuous hours at nominal setting 12 at room temperatureOperating Temperature -40°F to 140°F (-40°C to 60°C)Country of Origin Made in USA Not Available For Export