Now, here is what you HAVE to do to screw this up:
1. Press the release button to begin the draw
2. Then you would HAVE to MOVE your trigger finger from point A to point B toward the location of the trigger as you draw and keep pressing at least slightly with the finger as you draw!
3. Then and only then would your trigger finger be in position to contact the trigger as the trigger cleared the holster thus allowing an ND.
4. The release button CAN NOT be actuated by pressing on this part of it
I hope this shows some of you out there that the holster works well, is designed very well and if someone has an ND with a SERPA, it is because THEY SCREWED UP, not because there is any design flaw or other deficiency with the holster. All that is crap. And I really don't care who you heard won't allow it on their range or training site.
I can see them not allowing it because there are just too many pin heads out there using them who do not train with their gear. There are stupid people all over. But there isn't anything wrong with the holster.