This folding stock does not fit all GHM9 gen 2 firearms. This stock has a notch that is used to secure it when folded. Not all GHM9 gen 2 lowers have this notch. Which means it does not have positive retention when folded. The notch is located on the right side of the gun above and to the left of the safety. Make sure you gun has this notch or your stock will not remain folded.It will flop around and scratch your lower receiver. I am 0/2 on B&T folding stocks. For such expensive products I should not be subjected to such a guessing game. Please add more pictures and update the description.