when you get to the range to sight it in, make sure to bring a tiny tube of blue thread lock with you.
Remove rear sight screw and with a toothpick, dab only a tiny tiny dot on the screw and put it back in the sight base.
Adjust the windage close as you can and then start to zero it in, after zeroing let it sit overnight and the screw will never come out on its oen like mine did, they are a ***** to find replacements.