That was my initial thought, except that the manual shows how to adjust the trigger. In fact, that's one of the nice features of the gun, you don't need a gunsmith to adjust the trigger, just an allen wrench. I wouldn't think the gun should be able to adjust so loose that it can go off. In hind sight, I should have followed the procedure you mentioned cma3366a, but I had never heard of something like this happening before.