I have the same problem with my m9 binding. I can't show you in a picture what the problem is. The last pic of the m9 the dude is pointing out the location. The screw that holds the hiback and the power strap doesn't stay in place no matter how tight it is. The teeth that hold are looked good so I must be the piece that connects the hiback and the power strap the failure.
I'm going to take a pic of the piece that I think it has the problem.
Last edited by sxdaca; 02-10-2013 at 12:40 PM.