I have a couple of them. Great glass. Mine are the tactical versions with turrets for dialing in your drop and windage. They seem to track well. I have one mounted on a 50 BMG and it has held up well. They don't have as much adjustment as some others at only 50 MOA. Unless you REALLY need the higher magnification, which I've found I really don't, I'd stick with the 2.5-16. It has 80 MOA of adjustment.