ADM QD is awesome.
This happened on the Aimpoint Micro/ ADM QD.
Please be aware that the small springs that give the unit a springy rebound feel, seat down into their own little nooks when tightened down.
As the user releases the QD, switching the OPEN lever and placing the unit in a pocket etc., the small spring has the chance to get bumped out of it's home (lost).
The levers need to be re-locked down to keep the springs secure from a good bounce on a picnic table or temporary gear dump pouch for the optic.
The QD clamp should still work without the springs, but it sure will tick ya' off when tinkering around out in the field.
I was shooting and acting as if my T1 micro had gone down and I needed to get it off the rail and keep shooting. It could have rattled out in my pocket or when I somewhat bumped it around the picnic table.
All in all, This was just my personal experience from tossing it in my pocket while it was an open QD system.
Call ADM for more springs. They have you covered.
This was my only gripe.
The mount is awesome, just be careful with open ADM QD levers.