Just got this Eotech package from GG&G 2 weeks ago. Still have the original reciept dated 11/1. Only been mounted on my AR and taken to the range 1 time to get it zeroed. Since then, I have found a good deal on a different optic from a buddy so I'm putting this one up for sale to fund that purchase. This sight takes the CR123 lithium batteries and comes installed with the GG&G rugged flip up lens covers. I also have the original , mint condition stock EoTech cover. This sight works perfectly and is very easy to use. It also has the controls on the left side so you can mount a magnifier behind it, and it has the raised front so you can mount it anywhere on your top rail. Product info for lens cover: EOTech Lens Covers | EOTech 516, 517, 553, 555, 556, and 557 Hood and Flip Up Lens Cover Combos ($50) Sale price is $415 obo. Will also consider trades for 3rd and 4th gen glocks, Sig's, 1911's, Tactical shotguns, or Aimpoint optics. Send me a message if you have any questions and I'll be more than happy to chat or discuss your trade. firstname.lastname@example.org 425-518-9699 Thanks for looking!