|I bought the QD 3x magnifier and the QD reflex in early March. The reflex is great - easy to use, keeps zero, and is worth the $$ (far more reasonable when compared to a $500 EOTech), but the QD mount on the other hand is a mess. Very wobbly base. If you tighten it, the release sticks, which is not good at all. Was having problems with it from day one.
Was doing a quick changeover from distance to CQ shooting at the range this weekend and a screw snapped, rendering the magnifier worthless. I threw on a friend's EOTech, sighted it in and it handled flawlessly.
A few weeks ago, I wrote a good and bad review on SightMark's site. Never posted, but I did get a note from their customer service person, trying to walk me through fixing it. I'm not an amature. I used his recommendation, but it is pretty simple: you get what you pay for.
Sending it back and will save up for an EOTech 3x magnifier.|