Eotech 555 The EOTech 555 HOLOgraphic Weapon Sight (HWS) is the 1st electro-optic sighting system to apply holographic technology to small and medium-sized weapon platforms. When used in Close Quarters Battle (CQB) environments, the EOTech 555 delivers amazing speed and accuracy gains, uncompromising use of peripheral vision, leaves no muzzle-side optical signature and is packaged in a compact, durable unit. Now deployed with elite Special Forces and SWAT teams the world over, the EOTech 555 delivers vastly improved shooting performance for all levels of operators. The EOTech 555 was designed specifically for the U.S. Marines. Length/Width/Height: 5.70"x1.8"x2.8" (145x46x71mm). Weight: 13.6 oz (386 grams). Waterproof: Submersersible to 33 feet. Color/Finish: Non-Reflective black with hard coat finish. Mount: Dual quick release throw levers designed specifically for the (MIL-STD-1913). Return to zero: Repeatable to 1MOA after re-mounting. Night Vision Brightness Range: 1000:1 with NV switch engaged. Battery Life: 1,000 continuous hours (Lithium) at nominal setting 12; 600 continuous with AA battery