It comes pre-zero'd from the factory. I can't read the manual, as it is all in Chinese. I asked the guy about that, and he just shrugged and said "Everything is made in China these days by good communist workers."
Anyway, he seems to be right, everything I have stuck it into, well, I can see it through both sights. Even the green laser is pointing right at the target.
You gotta see it to believe it, this thing is lethal. I even tested it on a bunch of stuck together phone books. Talk about penetration. It goes through more pages than a bonded JHP.
Regards.
Mark