the one I bought fell apart after only a handful of shots on the gun - my AR... the mirror/lens assembly came apart... thats after painstakingly mounting it since the scope rings that came with it were drilled off center (to the inside) making it slightly too small for the scope... I will send it back and try to get satisfaction, but after speaking with their customer service dept, I doubt it....I'll hold my rating until I see if they will fix it by sending me a new one.... then I'll try again... but initially, my rating is an FFFFF--------- this thing is :bull: