I bought an 870 tactical shotgun with the XS Ghost Ring Sights. I took it to the range and it shot slugs 10 inches high at 25 yards out of the box. I tried to adjust elevation but ran out of adjustment and was still shooting 6 inches high. I called Remington and they had me take it to a local authorized gunsmith for repair. He put a bore scope on it and confirmed it was shooting high and sent it back to Remington. I got it back the other day and the repair slip said they bent the barrel. I did not know you can bend a barrel to adjust accuracy. I have not shot it yet I hope it worked.