Negative I did not take the barrel off. I did however take the AR apart. I took the barrel shroud off. I even took the sling stud off. I then put everything back on. When I put the sling stud back on I did not tighten it down that tight. Everything appeared straight. I did not do the mirror trick. Even though I wanted to because I wanted to see how it worked. I took it out today and I managed to get it zeroed in no time at all. I zeroed at 50 yards and was dead on at 200. It was real cold so I had to do everything quick. When I get back out there I will try and take some more pics of my groups and stuff
