Good, but could be better - Strike Industries T1 QD Rail Apapter Red Dot Sight Mount

I got this to put on my ar pistol with a mil-spec upper, I put it on and there was enough play that it wouldn't hold zero with the set screw all the way tightened.
I took it off and tried to reach out to SI, after a week with no reply to my request for a solution(Yes, I checked my spam folder.), I carefully took the base apart and turned the pinned screw a half turn, then put it back together, now it works perfectly.
It is a good base, and solid construction.

[My fix, turn the set screw out, there is a spring and detent ball, so be mindful and recommend the use of a magnet to catch it, then take the lever arm pin out, turn the cross bar screw, then put it back together in the order, you took it apart. This probably voids the warranty so do so at your own risk.]