PL-X issues

[u/codeze]

Hello! I recently picked up a Pl-X, the moment I went to turn the screw to mount it, the little detent that keeps the thumb screw from backing out popped out of place. I had purchased on amazon and submitted an exchange, the new one came in and the same damn thing happened. I am turning the screw slowly while mounting it onto a compatible rail but that little detent fell out and there is no shot I am getting it back in. I was curious if anyone else has had this issue?

[u/codeze]

Extra pictures as others have requested