Eotech 558 Holographic Sight -

Length:5.6 in (142.3mm)
Width:2.2 in (55.9mm)
Height:2.9 in (73.7mm)
Weight:13.8 oz. (391.2g)
Mount: 1" Weaver or Mil-Std 1913 rail
Power Source: AA (Alkaline or Lithium)
Brightness: 30 settings (10 for NV)
Water Resistance:33 ft. (10m)
Battery Life: Approx. 1,000 continuous hours (Lithium) or 600 hours (Alkaline)
at nominal setting 12 at room temperature
Color/Finish: Black
Night Vision Compatible: Gen I-III
Reticle: 68 MOA ring with 1 MOA dot