UGLY but it works. We have a Sun 4x Tactical on a AR15 and yesterday out of boredom I decided to do the old shoot around the box. Shoot then 4clicks to right, shoot then, 8 clicks down shoot, 8 clicks left shoot, the old make a box with the scope checking the tracking. Wow this scope went nuts and made more of a oval then a square where I adjusted for BUT it ended up within a 1/2 inch of where I started and it does hold. No more of these for me but I thought it was interesting. Yup, you get what you pay for!!