Waste of money - NCSTAR 3X Magnifier w/Flip to Side QR Mount

Bought this magnifier and was very anxious to use it. Well before I could even put rounds down range with it, the pin that holds in on the rail fell out. So now the only thing holding it onto the weapon is the perpendicular squeeze to the rail. It vibrates loose and falls off. Also don't be fooled by the spring loaded feature. I assure you it is not, it just flops around and you have to manually push the spring loaded BUTTON and then swing the optic off to the side. This thing is just a paper weight for me now