I purchased this scope for my AR15 build because all of the reviews were decent, the scope is really clear, and the BDC has bubbles so you can see the target during acquisition. Took it out a few times and only had to make a few adjustments here and there. On my most recent trip out (5th time using this scope) to the range, the optic would not hold zero. The more I shot the more it moved, and I had to continuously make adjustments. It got so bad that I maxed out the up and down adjustment and it was nowhere near the center of sight picture. I continued to fire using some Kentucky windage, but it continued to move and I could no longer even see where my rounds were impacting through the scope. Sad part was that this was only from 50-100 meters. I am going to see what I can do about returning this scope because I have no purpose for a scope that doesn't work.